Annotation of cci/usr/src/man/man1/mail.1, revision 1.1

1.1     ! root        1: .TH MAIL 1 "1 April 1983"
        !             2: .UC 4
        !             3: .SH NAME
        !             4: mail \- send and receive mail
        !             5: .SH SYNOPSIS
        !             6: .B mail
        !             7: [
        !             8: .B \-v
        !             9: ]
        !            10: [
        !            11: .B \-i
        !            12: ]
        !            13: [
        !            14: .B \-n
        !            15: ]
        !            16: [
        !            17: .B \-s
        !            18: subject
        !            19: ]
        !            20: [
        !            21: user ...
        !            22: ]
        !            23: .br
        !            24: .B mail
        !            25: [
        !            26: .B \-v
        !            27: ]
        !            28: [
        !            29: .B \-i
        !            30: ]
        !            31: [
        !            32: .B \-n
        !            33: ]
        !            34: .B \-f
        !            35: [
        !            36: name
        !            37: ]
        !            38: .br
        !            39: .B mail
        !            40: [
        !            41: .B \-v
        !            42: ]
        !            43: [
        !            44: .B \-i
        !            45: ]
        !            46: [
        !            47: .B \-n
        !            48: ]
        !            49: .B \-u
        !            50: user
        !            51: .SH INTRODUCTION
        !            52: .I Mail
        !            53: is a intelligent mail processing system, which has
        !            54: a command syntax reminiscent of
        !            55: .I ed
        !            56: with lines replaced by messages.
        !            57: .PP
        !            58: The
        !            59: .B \-v
        !            60: flag puts mail into verbose mode; the details of
        !            61: delivery are displayed on the users terminal.
        !            62: The
        !            63: .B \-i
        !            64: flag causes tty interrupt signals to be ignored. This is
        !            65: particularly useful when using
        !            66: .I mail
        !            67: on noisy phone lines.
        !            68: The
        !            69: .B \-n
        !            70: flag inhibits the reading of /usr/lib/Mail.rc.
        !            71: .PP
        !            72: .I "Sending mail.\ "
        !            73: To send a message to one or more other people,
        !            74: .I mail
        !            75: can be invoked with arguments which are the names of people to
        !            76: send to.  You are then expected to type in your message, followed
        !            77: by an \s-2EOT\s0 (control\-D) at the beginning of a line.
        !            78: A subject may be specified on the command line by using the
        !            79: .B \-s
        !            80: flag. (Only the first argument after the
        !            81: .B \-s
        !            82: flag is used as a subject; be careful to quote subjects
        !            83: containing spaces.)
        !            84: The section below, labeled
        !            85: .I "Replying to or originating mail,"
        !            86: describes some features of
        !            87: .I mail
        !            88: available to help you compose your letter.
        !            89: .PP
        !            90: .I "Reading mail.\ "
        !            91: In normal usage
        !            92: .I mail
        !            93: is given no arguments and checks your mail out of the
        !            94: post office, then
        !            95: prints out a one line header of each message there.
        !            96: The current message is initially the first message (numbered 1)
        !            97: and can be printed using the
        !            98: .B print
        !            99: command (which can be abbreviated \fBp\fR).
        !           100: You can move among the messages much as you move between lines in
        !           101: .IR ed ,
        !           102: with the commands `+' and `\-' moving backwards and forwards, and
        !           103: simple numbers.
        !           104: .PP
        !           105: .I "Disposing of mail.\ "
        !           106: After examining a message you can
        !           107: .B delete
        !           108: (\fBd\fR)
        !           109: the message or
        !           110: .B reply
        !           111: (\fBr\fR)
        !           112: to it.
        !           113: Deletion causes the
        !           114: .I mail
        !           115: program to forget about the message.
        !           116: This is not irreversible; the message can be
        !           117: .B undeleted
        !           118: (\fBu\fR)
        !           119: by giving its number, or the
        !           120: .I mail
        !           121: session can be aborted by giving the
        !           122: .B exit
        !           123: (\fBx\fR)
        !           124: command.
        !           125: Deleted messages will, however, usually disappear never to be seen again.
        !           126: .PP
        !           127: .I "Specifying messages.\ "
        !           128: Commands such as
        !           129: .B print
        !           130: and
        !           131: .B delete
        !           132: can be given a list of message numbers as arguments to apply
        !           133: to a number of messages at once.
        !           134: Thus ``delete 1 2'' deletes messages 1 and 2, while ``delete 1\-5''
        !           135: deletes messages 1 through 5.
        !           136: The special name ``*'' addresses all messages, and ``$'' addresses
        !           137: the last message; thus the command
        !           138: .B top
        !           139: which prints the first few lines of a message could be used in
        !           140: ``top *'' to print the first few lines of all messages.
        !           141: .PP
        !           142: .I "Replying to or originating mail.\ "
        !           143: You can use the
        !           144: .B reply
        !           145: command to
        !           146: set up a response to a message, sending it back to the
        !           147: person who it was from.
        !           148: Text you then type in, up to an end-of-file,
        !           149: defines the contents of the message.
        !           150: While you are composing a message,
        !           151: .I mail
        !           152: treats lines beginning with the character `~' specially.
        !           153: For instance, typing ``~m'' (alone on a line) will place a copy
        !           154: of the current message into the response right shifting it by a tabstop.
        !           155: Other escapes will set up subject fields, add and delete recipients
        !           156: to the message and allow you to escape to an editor to revise the
        !           157: message or to a shell to run some commands.  (These options
        !           158: are given in the summary below.)
        !           159: .PP
        !           160: .I "Ending a mail processing session.\ "
        !           161: You can end a
        !           162: .I mail
        !           163: session with the
        !           164: .B quit
        !           165: (\fBq\fR)
        !           166: command.
        !           167: Messages which have been examined go to your
        !           168: .I mbox
        !           169: file unless they have been deleted in which case they are discarded.
        !           170: Unexamined messages go back to the post office.
        !           171: The
        !           172: .B \-f
        !           173: option causes
        !           174: .I mail
        !           175: to read in the contents of your
        !           176: .I mbox
        !           177: (or the specified file)
        !           178: for processing; when you
        !           179: .BR quit,
        !           180: .I mail
        !           181: writes undeleted messages back to this file.
        !           182: The
        !           183: .B \-u
        !           184: flag is a short way of doing
        !           185: "mail
        !           186: .B \-f
        !           187: /usr/spool/mail/user".
        !           188: .PP
        !           189: .I "Personal and systemwide distribution lists.\ "
        !           190: It is also possible to create a personal distribution lists so that,
        !           191: for instance, you can send mail to ``cohorts'' and have it go
        !           192: to a group of people.
        !           193: Such lists can be defined by placing a line like
        !           194: .IP
        !           195: alias cohorts bill ozalp jkf mark kridle@ucbcory
        !           196: .PP
        !           197: in the file \&.mailrc in your home directory.
        !           198: The current list of such aliases can be displayed with the
        !           199: .B alias
        !           200: .B (a)
        !           201: command in
        !           202: .IR mail .
        !           203: System wide distribution lists can be created by editing
        !           204: /usr/lib/aliases, see
        !           205: .IR aliases (5)
        !           206: and
        !           207: .IR sendmail (8);
        !           208: these are kept in a different syntax.
        !           209: In mail you send, personal aliases will be expanded in mail sent
        !           210: to others so that they will be able to \fBreply\fR to the recipients.
        !           211: System wide \fIaliases\fR are not expanded when the mail is sent,
        !           212: but any reply returned to the machine will have the system wide
        !           213: alias expanded as all mail goes through
        !           214: .IR sendmail .
        !           215: .PP
        !           216: .I Mail
        !           217: has a number of options which can be set in the
        !           218: .I \&.mailrc
        !           219: file to alter its behavior; thus ``set askcc'' enables the ``askcc''
        !           220: feature.  (These options are summarized below.)
        !           221: .SH SUMMARY
        !           222: (Adapted from the `Mail Reference Manual')
        !           223: .PP
        !           224: Each command is typed on a line by itself, and may take arguments
        !           225: following the command word.  The command need not be typed in its
        !           226: entirety \- the first command which matches the typed prefix is used.
        !           227: For commands which take message lists as arguments, if no message
        !           228: list is given, then the next message forward which satisfies the
        !           229: command's requirements is used.  If there are no messages forward of
        !           230: the current message, the search proceeds backwards, and if there are no
        !           231: good messages at all,
        !           232: .I mail
        !           233: types ``No applicable messages'' and
        !           234: aborts the command.
        !           235: .TP 12n
        !           236: .B \-
        !           237: Goes to the previous message and prints it out.  If given a numeric
        !           238: argument
        !           239: .IR n ,
        !           240: goes to the
        !           241: .IR n -th
        !           242: previous message and prints it.
        !           243: .TP
        !           244: .B ?
        !           245: Prints a brief summary of commands.
        !           246: .TP
        !           247: .B !
        !           248: Executes the \s-2UNIX\s0 shell command which follows.
        !           249: .TP
        !           250: .B Print
        !           251: (\fBP\fR)
        !           252: Like
        !           253: .B print
        !           254: but also prints out ignored header fields. See also
        !           255: .B print
        !           256: and
        !           257: .B ignore.
        !           258: .TP
        !           259: .B Reply
        !           260: (\fRR\fR)
        !           261: Reply to originator. Does not reply to other
        !           262: recipients of the original message.
        !           263: .TP
        !           264: .B Type
        !           265: (\fTT\fR)
        !           266: Identical to the
        !           267: .B Print
        !           268: command.
        !           269: .TP
        !           270: .B alias
        !           271: (\fBa\fR) With no arguments, prints out all currently-defined aliases.  With one
        !           272: argument, prints out that alias.  With more than one argument, creates
        !           273: an new or changes an on old alias.
        !           274: .TP
        !           275: .B alternates
        !           276: (\fBalt\fR)
        !           277: The
        !           278: .B alternates
        !           279: command is useful if you have accounts on several machines.
        !           280: It can be used to inform
        !           281: .I mail
        !           282: that the listed addresses are really you. When you
        !           283: .B reply
        !           284: to messages,
        !           285: .I mail
        !           286: will not send a copy of the message to any of the addresses
        !           287: listed on the
        !           288: .I alternates
        !           289: list. If the
        !           290: .B alternates
        !           291: command is given with no argument, the current set of alternate
        !           292: names is displayed.
        !           293: .TP
        !           294: .B chdir
        !           295: (\fBc\fR) Changes the user's working directory to that specified, if given.  If
        !           296: no directory is given, then changes to the user's login directory.
        !           297: .TP
        !           298: .B copy
        !           299: (\fBco\fR)
        !           300: The
        !           301: .B copy
        !           302: command does the same thing that
        !           303: .B save 
        !           304: does, except that it does not mark the messages it
        !           305: is used on for deletion when you quit.
        !           306: .TP
        !           307: .B delete
        !           308: (\fBd\fR) Takes a list of messages as argument and marks them all as deleted.
        !           309: Deleted messages will not be saved in
        !           310: .IR mbox ,
        !           311: nor will they be available for most other commands.  
        !           312: .TP
        !           313: .B dp
        !           314: (also \fBdt\fR) Deletes the current message and prints the next message.
        !           315: If there is no next message, 
        !           316: .I mail
        !           317: says ``at EOF.''
        !           318: .TP
        !           319: .B edit
        !           320: (\fBe\fR) Takes a list of messages and points the text editor at each one in
        !           321: turn.  On return from the editor, the message is read back in.
        !           322: .TP
        !           323: .B exit
        !           324: (\fBex\fR or \fBx\fR) Effects an immediate return to the Shell without
        !           325: modifying the user's system mailbox, his
        !           326: .I mbox
        !           327: file, or his edit file in
        !           328: .BR \-f .
        !           329: .TP
        !           330: .B file
        !           331: (\fBfi\fR)
        !           332: The same as
        !           333: .BR folder .
        !           334: .TP
        !           335: .B folders
        !           336: List the names of the folders in your folder directory.
        !           337: .TP
        !           338: .B folder
        !           339: (\fBfo\fR)
        !           340: The
        !           341: .B folder
        !           342: command switches to a new mail file or folder. With no
        !           343: arguments, it tells you which file you are currently reading.
        !           344: If you give it an argument, it will write out changes (such
        !           345: as deletions) you have made in the current file and read in
        !           346: the new file. Some special conventions are recognized for
        !           347: the name. # means the previous file, % means your system
        !           348: mailbox, %user means user's system mailbox, & means
        !           349: your \~/mbox file, and +folder means a file in your folder
        !           350: directory.
        !           351: .TP
        !           352: .B from
        !           353: (\fBf\fR) Takes a list of messages and prints their message headers.
        !           354: .TP
        !           355: .B headers
        !           356: (\fBh\fR) Lists the current range of headers, which is an 18 message group.  If
        !           357: a ``+'' argument is given, then the next 18 message group is printed, and if
        !           358: a ``\-'' argument is given, the previous 18 message group is printed.
        !           359: .TP
        !           360: .B help
        !           361: A synonym for ?
        !           362: .TP
        !           363: .B hold
        !           364: (\fBho\fR, also \fBpreserve\fR) Takes a message list and marks each
        !           365: message therein to be saved in the
        !           366: user's system mailbox instead of in
        !           367: .IR mbox .
        !           368: Does not override the
        !           369: .B delete
        !           370: command.
        !           371: .TP
        !           372: .B ignore
        !           373: Add the list of header fields named to the
        !           374: .IR "ignored list" .
        !           375: Header fields in the ignore list are not printed
        !           376: on your terminal when you print a message. This
        !           377: command is very handy for suppression of certain machine-generated
        !           378: header fields. The
        !           379: .B Type
        !           380: and
        !           381: .B Print
        !           382: commands can be used to print a message in its entirety, including
        !           383: ignored fields. If
        !           384: .B ignore
        !           385: is executed with no arguments, it lists the current set of
        !           386: ignored fields.
        !           387: .TP
        !           388: .B mail
        !           389: (\fBm\fR) Takes as argument login names and distribution group names and sends
        !           390: mail to those people.
        !           391: .TP
        !           392: .B mbox
        !           393: Indicate that a list of messages be sent to
        !           394: .I mbox
        !           395: in your home directory when you quit. This is the default
        !           396: action for messages if you do
        !           397: .I not
        !           398: have the
        !           399: .I hold
        !           400: option set.
        !           401: .TP
        !           402: .B next
        !           403: (\fBn\fR like \fB+\fR or CR) Goes to the next message in sequence and types it.
        !           404: With an argument list, types the next matching message.
        !           405: .TP
        !           406: .B preserve
        !           407: (\fBpre\fR)
        !           408: A synonym for
        !           409: .BR hold .
        !           410: .TP
        !           411: .B print
        !           412: (\fBp\fR)
        !           413: Takes a message list and types out each message on the user's terminal.
        !           414: .TP
        !           415: .B quit
        !           416: (\fBq\fR) Terminates the session, saving all undeleted, unsaved messages in
        !           417: the user's
        !           418: .I mbox
        !           419: file in his login directory, preserving all messages marked with
        !           420: .B hold
        !           421: or
        !           422: .B preserve
        !           423: or never referenced
        !           424: in his system mailbox, and removing all other messages from his system
        !           425: mailbox.  If new mail has arrived during the session, the message
        !           426: ``You have new mail'' is given.  If given while editing a
        !           427: mailbox file with the
        !           428: .B \-f
        !           429: flag, then the edit file is rewritten.  A return to the Shell is
        !           430: effected, unless the rewrite of edit file fails, in which case the user
        !           431: can escape with the
        !           432: .B exit
        !           433: command.
        !           434: .TP
        !           435: .B reply
        !           436: (\fBr\fR)
        !           437: Takes a message list and sends mail to the sender and all
        !           438: recipients of the specified message.
        !           439: The default message must not be deleted.
        !           440: .TP
        !           441: .B respond
        !           442: A synonym for
        !           443: .BR reply .
        !           444: .TP
        !           445: .B save
        !           446: (\fBs\fR) Takes a message list and a filename and appends each message in
        !           447: turn to the end of the file.  The filename in quotes, followed by the line
        !           448: count and character count is echoed on the user's terminal.  
        !           449: .TP
        !           450: .B set
        !           451: (\fBse\fR) With no arguments, prints all variable values.  Otherwise, sets
        !           452: option.  Arguments are of the form
        !           453: ``option=value''
        !           454: or
        !           455: ``option.''
        !           456: .TP
        !           457: .B shell
        !           458: (\fBsh\fR) Invokes an interactive version of the shell.
        !           459: .TP
        !           460: .B size
        !           461: Takes a message list and prints out the size in characters of each
        !           462: message.
        !           463: .TP
        !           464: .B source
        !           465: (\fBso\fR)
        !           466: The
        !           467: .B source
        !           468: command reads
        !           469: .I mail
        !           470: commands from a file.
        !           471: .TP
        !           472: .B top
        !           473: Takes a message list and prints the top few lines of each.  The number of
        !           474: lines printed is controlled by the variable
        !           475: .B toplines
        !           476: and defaults to five.
        !           477: .TP
        !           478: .B type
        !           479: (\fBt\fR) A synonym for
        !           480: .BR print .
        !           481: .TP
        !           482: .B unalias
        !           483: Takes a list of names defined by
        !           484: .B alias
        !           485: commands and discards the remembered groups of users.  The group names
        !           486: no longer have any significance.
        !           487: .TP
        !           488: .B undelete
        !           489: (\fBu\fR) Takes a message list and marks each one as
        !           490: .I not
        !           491: being deleted.
        !           492: .TP
        !           493: .B unset
        !           494: Takes a list of option names and discards their remembered values;
        !           495: the inverse of
        !           496: .BR set .
        !           497: .TP
        !           498: .B visual
        !           499: (\fBv\fR) Takes a message list and invokes the display editor on each message.
        !           500: .TP
        !           501: .B write
        !           502: (\fBw\fR) A synonym for
        !           503: .BR save .
        !           504: .TP
        !           505: .B xit
        !           506: (\fBx\fR) A synonym for
        !           507: .BR exit .
        !           508: .TP
        !           509: .B z
        !           510: .I Mail
        !           511: presents message headers in windowfuls as described under the
        !           512: .B headers
        !           513: command. You can move
        !           514: .IR mail 's
        !           515: attention forward to the next window with the
        !           516: .B z
        !           517: command. Also, you can move to the previous window by using
        !           518: .BR z\- .
        !           519: .PP
        !           520: Here is a summary of the tilde escapes,
        !           521: which are used when composing messages to perform
        !           522: special functions.  Tilde escapes are only recognized at the beginning
        !           523: of lines.  The name
        !           524: ``tilde\ escape''
        !           525: is somewhat of a misnomer since the actual escape character can be set
        !           526: by the option
        !           527: .B escape.
        !           528: .TP 12n
        !           529: .BR ~! command
        !           530: Execute the indicated shell command, then return to the message.
        !           531: .TP
        !           532: \fB~c\fR name ...
        !           533: Add the given names to the list of carbon copy recipients.
        !           534: .TP
        !           535: .B ~d
        !           536: Read the file ``dead.letter'' from your home directory into the message.
        !           537: .TP
        !           538: .B ~e
        !           539: Invoke the text editor on the message collected so far.  After the
        !           540: editing session is finished, you may continue appending text to the
        !           541: message.
        !           542: .TP
        !           543: \fB~f\fR messages
        !           544: Read the named messages into the message being sent.
        !           545: If no messages are specified, read in the current message.
        !           546: .TP
        !           547: .B ~h
        !           548: Edit the message header fields by typing each one in turn and allowing
        !           549: the user to append text to the end or modify the field by using the
        !           550: current terminal erase and kill characters.
        !           551: .TP
        !           552: \fB~m\fR messages
        !           553: Read the named messages into the message being sent, shifted right one
        !           554: tab.  If no messages are specified, read the current message.
        !           555: .TP
        !           556: .B ~p
        !           557: Print out the message collected so far, prefaced by the message header
        !           558: fields.
        !           559: .TP
        !           560: .B ~q
        !           561: Abort the message being sent, copying the message to
        !           562: ``dead.letter''
        !           563: in your home directory if
        !           564: .B save
        !           565: is set.
        !           566: .TP
        !           567: \fB~r\fR filename
        !           568: Read the named file into the message.
        !           569: .TP
        !           570: \fB~s\fR string
        !           571: Cause the named string to become the current subject field.
        !           572: .TP
        !           573: \fB~t\fR name ...
        !           574: Add the given names to the direct recipient list.
        !           575: .TP
        !           576: .B ~v
        !           577: Invoke an alternate editor (defined by the VISUAL option) on the
        !           578: message collected so far.  Usually, the alternate editor will be a
        !           579: screen editor.  After you quit the editor, you may resume appending
        !           580: text to the end of your message.
        !           581: .TP
        !           582: \fB~w\fR filename
        !           583: Write the message onto the named file.
        !           584: .TP
        !           585: \fB~\||\|\fRcommand
        !           586: Pipe the message through the command as a filter.  If the command gives
        !           587: no output or terminates abnormally, retain the original text of the
        !           588: message.  The command
        !           589: .IR fmt (1)
        !           590: is often used as
        !           591: .I command
        !           592: to rejustify the message.
        !           593: .TP
        !           594: .BR ~~ string
        !           595: Insert the string of text in the message prefaced by a single ~.  If
        !           596: you have changed the escape character, then you should double
        !           597: that character in order to send it.
        !           598: .PP
        !           599: Options are controlled via the
        !           600: .B set
        !           601: and
        !           602: .B unset
        !           603: commands.  Options may be either binary, in which case it is only
        !           604: significant to see whether they are set or not, or string, in which
        !           605: case the actual value is of interest.
        !           606: The binary options include the following:
        !           607: .TP 15n
        !           608: .B append
        !           609: Causes messages saved in
        !           610: .I mbox
        !           611: to be appended to the end rather than prepended.
        !           612: (This is set in
        !           613: /usr/lib/Mail.rc
        !           614: on version 7 systems.)
        !           615: .TP
        !           616: .B ask
        !           617: Causes
        !           618: .I mail
        !           619: to prompt you for the subject of each message you send.  If
        !           620: you respond with simply a newline, no subject field will be sent.
        !           621: .TP
        !           622: .B askcc
        !           623: Causes you to be prompted for additional carbon copy recipients at the
        !           624: end of each message.  Responding with a newline indicates your
        !           625: satisfaction with the current list.
        !           626: .TP
        !           627: .B autoprint
        !           628: Causes the
        !           629: .B delete
        !           630: command to behave like
        !           631: .B dp
        !           632: \- thus, after deleting a message, the next one will be typed
        !           633: automatically.
        !           634: .TP
        !           635: .B debug
        !           636: Setting the binary option
        !           637: .I debug
        !           638: is the same as specifying
        !           639: .B \-d
        !           640: on the command line and causes
        !           641: .I mail
        !           642: to output all sorts of information useful for debugging
        !           643: .IR mail .
        !           644: .TP
        !           645: .B dot
        !           646: The binary option
        !           647: .I dot
        !           648: causes
        !           649: .I mail
        !           650: to interpret a period alone on a line as the terminator
        !           651: of a message you are sending.
        !           652: .TP
        !           653: .B hold
        !           654: This option is used to hold messages in the system mailbox
        !           655: by default.
        !           656: .TP
        !           657: .B ignore
        !           658: Causes interrupt signals from your terminal to be ignored and echoed as
        !           659: @'s.
        !           660: .TP
        !           661: .B ignoreeof
        !           662: An option related to
        !           663: .I dot
        !           664: is
        !           665: .I ignoreeof
        !           666: which makes
        !           667: .I mail
        !           668: refuse to accept a control-d as the end of a message.
        !           669: .I Ignoreeof
        !           670: also applies to
        !           671: .I mail
        !           672: command mode.
        !           673: .TP
        !           674: .B metoo
        !           675: Usually, when a group is expanded that contains the sender, the sender
        !           676: is removed from the expansion.  Setting this option causes the sender
        !           677: to be included in the group.
        !           678: .TP
        !           679: .B nosave
        !           680: Normally, when you abort a message with two \s-2RUBOUT\s0,
        !           681: .I mail
        !           682: copies the partial letter to the file ``dead.letter''
        !           683: in your home directory. Setting the binary option
        !           684: .I nosave
        !           685: prevents this.
        !           686: .TP
        !           687: .B quiet
        !           688: Suppresses the printing of the version when first invoked.
        !           689: .TP
        !           690: .B verbose
        !           691: Setting the option
        !           692: .I verbose
        !           693: is the same as using the
        !           694: .B \-v
        !           695: flag on the command line. When mail runs in verbose mode,
        !           696: the actual delivery of messages is displayed on he users
        !           697: terminal.
        !           698: .PP
        !           699: The following options have string values:
        !           700: .TP 15n
        !           701: EDITOR
        !           702: Pathname of the text editor to use in the
        !           703: .B edit
        !           704: command and ~e escape.  If not defined, then a default editor is used.
        !           705: .TP
        !           706: SHELL
        !           707: Pathname of the shell to use in the
        !           708: .B !
        !           709: command and the ~! escape.  A default shell is used if this option is
        !           710: not defined.
        !           711: .TP
        !           712: VISUAL
        !           713: Pathname of the text editor to use in the
        !           714: .B visual
        !           715: command and ~v escape.
        !           716: .TP
        !           717: .B crt
        !           718: The valued option
        !           719: .I crt
        !           720: is used as a threshold to determine how long a message must
        !           721: be before
        !           722: .I more
        !           723: is used to read it.
        !           724: .TP
        !           725: .B escape
        !           726: If defined, the first character of this option gives the character to
        !           727: use in the place of ~ to denote escapes.
        !           728: .TP
        !           729: .B folder
        !           730: The name of the directory to use for storing folders of
        !           731: messages. If this name begins with a `/',
        !           732: .I mail
        !           733: considers it to be an absolute pathname; otherwise, the
        !           734: folder directory is found relative to your home directory.
        !           735: .TP
        !           736: .B record
        !           737: If defined, gives the pathname of the file used to record all outgoing
        !           738: mail.  If not defined, then outgoing mail is not so saved.
        !           739: .TP
        !           740: .B toplines
        !           741: If defined, gives the number of lines of a message to be printed out
        !           742: with the
        !           743: .B top
        !           744: command; normally, the first five lines are printed.
        !           745: .SH FILES
        !           746: .if n .ta 2.5i
        !           747: .if t .ta 1.8i
        !           748: /usr/spool/mail/*      post office
        !           749: .br
        !           750: ~/mbox your old mail
        !           751: .br
        !           752: ~/.mailrc      file giving initial mail commands
        !           753: .br
        !           754: /tmp/R#        temporary for editor escape
        !           755: .br
        !           756: /usr/lib/Mail.help*    help files
        !           757: .br
        !           758: /usr/lib/Mail.rc       system initialization file
        !           759: .br
        !           760: Message*       temporary for editing messages
        !           761: .SH "SEE ALSO"
        !           762: binmail(1), fmt(1), newaliases(1), aliases(5), sendmail(8),
        !           763: .br
        !           764: `The Mail Reference Manual'
        !           765: .SH BUGS
        !           766: There are many flags that are not documented here. Most are
        !           767: not useful to the general user.
        !           768: .br
        !           769: Usually,
        !           770: .I mail
        !           771: is just a link to
        !           772: .IR Mail ,
        !           773: which can be confusing.
        !           774: .SH AUTHOR
        !           775: Kurt Shoens

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