Table of Contents
Introduction
The UNIX mail program is a basic e-mail program. It allows the
sending and receiving of text-only
e-mail. It is not MIME-compliant, and therefore is not suitable
for sending binary files such as images,
word processor documents, or spreadsheets. For such items, use
the Pine mail program, or one of the
graphical mail clients such as Thunderbird 2.x or Outlook
Express 6. See Other Mail
Programs for more information.
For incoming mail, there are commands to read, save, delete,
and reply to messages. For sending mail,
you can edit, review, and make other changes to a message as it is
composed, and then send it to one or
more individuals, or to a list of people.
Back to table of contents
Conventions Used in this Document
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Text style:
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Usage:
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italic
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keywords, glossary entries and text that
is emphasized.
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bold
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text that is emphasized.
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fixed
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a computer response or prompt as shown on
screen.
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bold fixed
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commands you type in (commands should be
typed in lower case-unless otherwise
indicated).
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italic fixed
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substituting a required variable or
command.
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Back to table of contents
Sending Mail
To send e-mail to a person you need to know the person's
login name and host computer
system. This is known as the person's e-mail address.
To send mail type:
Mail
login-name@hostname
Note: To call the UNIX Mail program in the
Glue UNIX systems, you must issue the
Mail command with an uppercase M.
Using a lowercase m will call a
different mail program. In the Office of Information Technology (OIT), you may use
either upper or lowercase.
Suppose you want to send mail to John Smith whose e-mail
address is jsmith@glue.umd.edu. At the
UNIX prompt you would type:
Mail jsmith@glue.umd.edu
and press Return. Here, jsmith is the login name
and glue.umd.edu is the address of
the host computer, or system, on which John has an account.
Note: To get more information about using UNIX, refer to Introduction to
the OIT UNIX system.
It is not necessary to include the system address if the person
you are sending mail to has an account
on the machine from which you are sending mail. If sending mail
from your Glue account to another Glue
account holder, you only type:
Mail jsmith
and press Return. Otherwise, you need the full e-mail
address.
For help in sending mail to an e-mail address that doesn't look
like an Internet address, contact the
OIT Help Desk.
After you issue the Mail command, the mail program will
prompt you for the subject of your
mail. If you wish to include a subject, type it and press
Return; if you don't want a subject,
press Return only. The mail program will then prompt you
with Cc: to send a carbon copy of
the mail item. If you want to send a copy of the message to
someone else, enter their login name/address or
aliases (see Using Mail Aliases) at the
Cc: prompt. If you do not want to send any
carbon copies, press Return.
You are now placed in the mail program's message editor. As you
type your message, remember to press
Return at the end of each line.
Note: If you do not press Return at the
end of each line, it may appear as though
the system is inserting Returns but, in fact, this
is not the case. If you do not press
Return your keyboard will lock up after 256
keystrokes, thus preventing you from
continuing.
Back to table of contents
Editing Your Message
If you make mistakes while typing your message and wish to
correct them, use the Delete (or
Del) key to erase them. You must make your corrections
before pressing Return.
Several functions can be invoked by typing a ~ (tilde)
followed by an option character at the
beginning of a blank line:
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~?
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gives you a list of the tilde
escapes that are available.
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~v or ~e
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("visual" or "editor") each of
these options, used at the beginning of a
line, will invoke editors to
create, modify, or add to your
message. Editors make it possible
to correct lines other than the one you
are typing, move text, and perform
other word processing operations that
aren't possible with the message
editor in the mail program.
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If you have not customized your EDITOR or VISUAL environment
variables, you'll get by
default:
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~v
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the vi editor.
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~e
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the ex editor.
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On Glue, the default editor is
pico.
When you finish with your text and are ready to send the mail,
save the text and exit from the editor
using the commands appropriate for that editor.
If you have customized your EDITOR or VISUAL environment
variables, use the commands appropriate to that
editor.
For more information about text editors, see the
On-line Documentation Sets.
Note: On Glue the default
.environment file contains lines which you can
uncomment and comment out to change from pico to
vi.
If you prefer to use a different editor from the default, you
can set either ~v or ~e (or
both) to call that editor. All you have to know is where the
editor you want to use is located on your
system. You can find this out by using the UNIX which
command. For instance, if you wanted to use
the emacs editor, you could find out where it is by
typing:
which emacs
On Glue, a pathname is displayed:
/usr/local/bin/emacs
You would then use this information to type one of the
following commands at the UNIX prompt before you
start the mail program to have either ~e or ~v
automatically put you into emacs:
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for ~e:
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setenv EDITOR
/usr/local/bin/emacs
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for ~v:
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setenv VISUAL
/usr/local/bin/emacs
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If, instead of typing the setenv command, you place it
in the appropriate startup file
(~/.environment on Glue or appropriate shell
configuration file,
i.e. .cshrc), your chosen editor will always be available
using the appropriate ~-option. You
can also do this by putting one of the following commands in your
.mailrc file (along with any other
mailer set commands you think would be useful).
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for ~e:
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set
EDITOR=/usr/local/bin/emacs
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for ~v:
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set
VISUAL=/usr/local/bin/emacs
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If you are using one of these special editors, the
~-options described in this document (which
are part of the mail program's message editor) will not work until
you leave that special editor.
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~h
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allows changes to your message
header (i.e., you can change the
To: (recipient) and Cc: (carbon
copy) lists and also change the
Subject: line).
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~m message#
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places a mail message you've
received from someone else into your current
mail message (Reading your
messages for a description of a message
number). The inserted message is
shifted to the right by a tab - usually
about 8 spaces. This may make the
text a bit difficult for the recipient to
read, since lines that are shifted
beyond 80 columns will wrap around on
the reader's screen, looking like
this:
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Here is your note accompanying the forwarded message
And here is the forwarded message, which is in-
dented
8 spaces and then wraps around into the empty
area
where the indentation is, making it hard to read
An alternative approach is to save the message you want to
forward, and put it into a file using the
s command (see Saving Mail Messages).
When you write to the person to whom you
wish to forward the message, you can place it in the e-mail with
the ~r option (see below), which
doesn't indent it. For clarity, it also helps to use a separator
to indicate where your mail ends and the
appended message begins:
-------------- forwarded message
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~r filename
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reads all contents of the file
known as filename into your current
message following the line you
just typed before the ~r.
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~s new-subject
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changes the subject line to
new-subject (it can be more than one word).
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~t users
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adds users to the To: list
(the list of people receiving your
message); users can be any
combination of login-name@mailaddresses and
aliases (see Using
Mail Aliases).
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~w filename
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writes (saves) your message to the
file known as filename.
For example,
~w bob.feb12
would save the current message to
a file called bob.feb12.
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~! command
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executes a UNIX command, but does
not put the output in your mail message.
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~~
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includes a single tilde as the
first character of a line.
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Back to table of contents
Sending Your Message
Once the message has been entered and is ready to be mailed (be
sure to exit any editors you may have
called with ~e or ~v), there are two ways by which
to send the mail and then exit the mail
program. In either case, first press Return to place the
cursor on a blank line. Then, either press
Ctrl-d (hold down the Ctrl (Control) key and type
d), or type a period (.) in
column 1 and press Return.
Back to table of contents
Aborting Your Message
If you decide that you want to quit the mail program without
sending your message, press Ctrl-c
twice. This command can not be issued while you are in an editor.
After pressing Ctrl-c the first time,
the mail program will prompt you to confirm that you wish to exit
without sending your message. The message
will be saved in a file named dead.letter in your home
directory. This is useful if you decide to send
the mail message later. If you abort another mail message, the
mail program overwrites the previous contents
of the dead.letter file; so, if you wish to keep the
contents of the first file, you should either
rename it or move
it to another directory.
Back to table of contents
Sending Mail
While using the mail program to read mail messages, you can
also send a mail message. Refer to
Other Mail Commands, for details.
Back to table of contents
Receiving and Reading Mail
If there are mail messages waiting for you when you log in to
your UNIX account, you will see
the message:
You have mail
You are automatically placed into the mail
program. On other machines, enter the
program by typing:
Mail
at the system prompt followed by pressing Return. A "new
mail has arrived" message appears (if you
received new mail while reading mail already in your mailbox).
When you first start the mail program, it tells you how many
messages are waiting and then displays the
header information for each message. The header information lists
the mail address of the sender, the date
and time the message was sent, the number of lines and characters
in the message, and as much of the
message's subject line as will fit on the screen.
The illustration in the next section indicates what a typical
UNIX mail account would display indicating
three new (N) mail messages and one old mail message which
was unread (U).
After the header information for the messages has been
displayed, you can read or issue mail commands at
the mail program prompt (&).
Some systems use the ">" symbol at the beginning of a line
which indicates this particular message is
the default message (i.e., the message that will be manipulated if
you do not specify a particular message
number). This message is the one referred to in the explanations
below as the "current message".
Back to table of contents
Reading Your Messages
To read a particular mail message, type the number of that
message at the mail prompt (&) and
press Return. For instance, to read the message from
akins@glue.umd.edu below, type 2
at the & prompt and press Return:
&2
Mail $Revision: 1.5 $ Type ? for help.. Type ? for
help. "/usr/spool/mail/userid":4 messages 3 new
U 1 jdoe@glue.umd.edu Tue Aug 27 11:56 12/4182
>N 2 akins@glue.umd.edu Wed Aug 28 09:12 13/33 "Good
N 3 johndoe Wed Aug 28 13:40 16/360
N 4 johndoe Thu Aug 29 10:14 82/1697 "lunch today?"
&
The mail message will be displayed on your screen. If the
message is more than one screen long, the
program will display a single screenful at a time. A -MORE-
message will appear at the bottom of the
screen to tell you that additional information exists. To view the
rest of the message, press the space
bar. Refer to the Using Set Commands section
in this document for information on
scrolling through text that appears on your screen.
Back to table of contents
Message List
If after reading any one mail item you wish to see the list of
messages again, type h at the
& prompt and press Return.
Back to table of contents
Replying to a Mail Message
To respond to an e-mail message that you have received, use one
of mail's two reply commands r or
R. Both commands are issued by typing the command followed
by the number of the e-mail message to
which you wish to reply. For example:
& r 2
would reply to message number two. If a reply command is issued
without a message number, a reply is
generated for the current message.
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r
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reply is sent to the original
sender and all other recipients of the
original mail message.
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R
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reply is sent to the original
sender only, not other recipients.
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The above commands differ only in who will receive the reply
message. Remember the difference between
the two reply commands. For example, if you are replying to a mail
message sent by your professor to the
entire class, you might prefer that only the professor receive
your reply. Since the r and R
commands are system dependant, the roles can change.
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Cleaning Up Old Mail
If you read your mail and take no further action, then when you
exit from the mail program all of your
messages will remain in your system mail file. The next time you
read mail, the old messages will appear
with any new mail you receive.
You should save whatever mail you want to keep and make sure
that all mail is deleted as soon as
possible. On most systems, mail is held in a common area, and one
person's accumulation of large volumes of
mail potentially jeopardizes the ability of others to get mail.
(On Glue, on the other hand, mail
storage space comes out of your own personal quota, which you can
handle in whatever manner is convenient for
you.)
The mail program's keepsave setting determines whether
mail that you save elsewhere is
automatically deleted or not. Some systems at the University have
keepsave set to retain mail after
you save it; others have it unset to delete such mail. You can
check this with the set command, and,
if you prefer, change it.
Back to table of contents
Saving Mail Messages
To save a mail message in a file, you must issue the save
command (s), followed by the numbers of
the messages you wish to save and the name of the file you wish to
save them in. There is no standard
file-you must give a file name.
& s message_list
filename
When using the save command, the message_list can
specify several message numbers, a single
message number, a range of numbers, or no message number. If you
do not specify a message number, the
"current" message is saved to the file. For example, to save two
messages (numbers 3 and
4) in a file named johnmail, type:
& s 3 4 johnmail
Back to table of contents
Deleting Mail Messages
Once you have read and/or saved a message, it is important to
remember to delete it (if it is still
there). The delete (d) command is used for this purpose.
Simply type the delete command followed by
the message numbers of the messages you wish to delete.
& d message_list
For example:
& d 3 4
This will delete messages 3 and 4 (which you
saved previously in a file named
johnmail). A range of numbers can be deleted by using a
hyphen. To delete messages
1 through 20 you would type the command as
follows:
& d 1-20
Back to table of contents
Undeleting Mail Messages
There is an undelete (u) command that you can use to
reactivate messages which have been
deleted; however the undelete command only works if you have not
yet exited the mail program. After exiting
the mail program, any messages that have been deleted cannot be
retrieved.
Back to table of contents
Exiting the Mail Program
There are two ways to exit the mail program:
Type q and press Return. This exits the
mail program and removes any deleted or
saved messages so that the next time you read your mail,
the deleted and saved messages will not
appear.
Type x and press Return. This
exits the mail program but does not remove any deleted or saved messages.
All messages will show up when you next call up the mail program.
Back to table of contents
Other Mail Commands
There are many other commands you can use to manipulate your
mail messages. Some of the most useful mail
commands are briefly described in this section.
In the following descriptions, a message_list may
consist of a single mail message number, a list
of message numbers separated by spaces, a range of message numbers
whose numbers are separated by a hyphen
(e.g., 2-4), or a combination of any of these. For
example:
d 3
d 3 5 6
d 3-5
d 3-5 7 10-14
If a message_list is not given, the mail program uses
the current message.
A user_list consists only of user names and mail
addresses separated by spaces, such as:
m jdoe@glue.umd.edu
carol@glue.umd.edu
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Command
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Explanation
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?
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displays a list of some of the
mail commands.
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! command
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executes a UNIX command then
returns to the mail program.
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d msg. #
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deletes the # message.
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e message_list
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edits listed messages with the
EDITOR text editor (see Editing
Your Message).
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h
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displays header information for
the twenty most recent active mail
messages.
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m user_list
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sends a mail message to the listed
users (this works the same as sending
mail from the command line).
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n
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displays the next message.
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q
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exits the mail program and removes
any deleted or saved messages. The next
time you read mail, the deleted
and saved messages will not appear.
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r msg. #
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replies to the message numbered #.
The subject line is the same as the
original message #, but a "Re:"
will be prefixed to show that it is a
reply. Reply is sent to the
original sender and all other recipients of
the original message.
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R msg. #
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sends a reply only to the original
sender. This is similar to the r
msg command.
Note: The r and R commands act
as described above on some systems, and the
opposite way on others (Glue-where you can
set the replyall setting, not
available on most other systems, to reverse
their meaning if you wish-see Using Set Commands). It is
a good idea to do a man
mail command on your system to make sure
you know how these two commands
behave.
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s msg.# filename
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saves the numbered message to a
file.
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u message_list
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undeletes listed message(s).
Note: The undelete command only
restores messages if you have not yet
quit the mail program. If you have
quit the mail program, deleted messages
cannot be restored.
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v message_list
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edits listed messages with the
VISUAL text editor.
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x or ex
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exits the mail program, but does
not remove deleted or saved messages from
the mail file.
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Back to table of contents
Customizing Your Mail Environment
The UNIX mail program allows you to customize your mail
environment to make it easier to send and
receive mail. These commands can be issued from the mail prompt
(&) or made automatic by placing
them in a file named .mailrc in your home directory.
Back to table of contents
Using Mail Aliases
The mail program provides a timesaving feature called
alias. Aliases are abbreviated names that
represent the mail address of a single user or several users. They
allow you to send mail to a group of
people quickly without requiring you to remember all of their
individual mail addresses, or to a single
user with a long or difficult-to-remember address. The
alias command is used to define aliases. For
example, a simple alias could look like:
alias rob rob@glue.umd.edu
and a group alias could look like:
alias class rob@glue.umd.edu mark
sue@glue.umd.edu
The latter would create an alias named class that
consists of the three class members listed. A
group alias can consist of actual addresses, aliases or a
combination of both. If you use the alias
command to define an alias while in the mail program, it will
exist until you exit the mail program; if
you put the alias command in your .mailrc file, it
will be available every time you send
mail.
To use a mail alias after you create it, substitute the alias
name for the login name and mail address
you would normally provide when sending mail. For example:
Mail class
sends mail to all the users listed under the alias class
in the .mailrc file.
If you have more names in your alias list than will fit on one
80-column line, you have three
options:
- Keep typing without pressing Return, allowing
the text to wrap around from line to
line. You can do this for up to 255 characters-a little
over 3 lines-but it is sloppy.
- Type the list on several lines, but end each line with
a \ (backslash) and press Return (the word alias only goes
on the first line).
- Make aliases for subsets of your list, and then make a
final alias consisting of a list of these "sub-aliases".
Back to table of contents
Using Set Commands
Many mail program options can be set with the mail program
set command. These options can be
used temporarily by issuing the set command while using the
mail program, or permanently by placing
the desired set commands in your .mailrc. The
default system options for the mail program
are set in the file /etc/mail/Mail.rc for Glue.
You can set additional options, or unset system defaults
with the unset command, in your
.mailrc.
Set command options are either binary or valued.
Binary set options are either set or not
set (on or off), there is no value associated with them; valued
set options are set to a particular
value. Binary options can be set simply by using the set
command and the option name.
set option
For example:
set keepsave
Binary options can be unset by using the unset command
and the option name. For example:
unset askcc
Valued options are set using the set command with a
slightly different format.
set option=value
For example:
set crt=24
would signal the mail program that you are working within a 24
line screen and it will pause every
screenful of text accordingly.
Several options can be set on a single line, such as:
set append dot ask hold askcc
crt=24
You can see a list of the binary options that are on/set and
value options that have a value by simply
typing:
set
Some of the more useful set options are briefly described
below. Valued set options are indicated
as such, all other options are binary.
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Set option
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Function
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ask
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prompts you for a subject whenever
you mail a message.
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askcc
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prompts you for a carbon copy list
whenever you mail a message.
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crt
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tells the mail program how many
lines long your terminal screen is so that
mail messages are displayed
appropriately. The system default is 24
lines. (crt is a valued
option.)
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dot
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allows you to use a .
(period) alone on a line to send your message
and quit the mail program.
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EDITOR
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specifies the text editor to
invoke when the ~e or e commands
are used to edit a mail message.
EDITOR is a valued option. Remember to
specify the full pathname.
On Glue, the
paths for the emacs and vi
editors are:
/usr/local/bin/emacs
/usr/ucb/vi
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hold
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messages that have been read but
not deleted or saved are left in your
system mail file.
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keepsave
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messages that have been saved to a
file and are left in your system mail
file instead of being deleted.
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metoo
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allows you to receive a copy of
the message.
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noheader
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header information for messages in
your system mail file is not displayed
when you start the mail program.
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record
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specifies the name of a file to
which all outgoing mail messages are
appended (record is a valued
option).
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replyall
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(Glue and Sun workstations)
reverse the meaning of R and r to
be like other systems in which
r replies to all recipients and
R replies to author.
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save
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aborted messages are saved in the
dead.letter file.
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VISUAL
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specifies what text editor is
invoked when the ~v or v
commands are used to edit a mail
message. VISUAL is a valued
option. Remember to give the full
path name of the editor as mentioned
previously in the EDITOR
description above.
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Back to table of contents
Forwarding Your Mail to Another Computer
If you have accounts on several computer systems, and you would
like to be able to read your e-mail on
only one system, you can forward your mail from your UNIX account
to another computer system. To do this,
simply create a file named .forward in your home directory
that contains your e-mail address on the
other system. For example, if you have a Glue account and
a Mail@umd account, and you wish to forward all
your mail to the Mail@umd system, use a text editor to create a
.forward file that contains
the line:
your-loginname@mail.umd.edu
As long as the .forward file exists, all
mail sent there will be forwarded to the
Mail@umd system. To stop mail forwarding, simply delete or rename the
.forward file.
Note: If you wish to forward mail from your
Glue account to your generic account,
you must place the .forward file in your mail
directory.
Back to table of contents
Other Mail Programs
The standard UNIX Berkeley mail program described here
is only one of many mail programs. Other
easier to use mail programs with more or better features are
available. Most of the publicly available UNIX
systems at the University have mailers available.
One example is the Pine mail program. Pine is the
more popular of the mail programs because
it can be used from any kind of computer. It has many advanced
features including a graphical interface for
reading mail, a help utility, and the ability to "attach" files to
mail messages. To use it, type
pine at the UNIX prompt.
Another example is the mail-handler (mh) system. The
mh system is a group of independent
programs that are called separately from the Unix prompt to
perform mail handling functions - sending mail,
or retrieving, reading, saving, replying to and forwarding
incoming mail. The mh mail handler has
facilities to set up aliases and can send blind carbon copies to
others within the mail program. Each mail
item is maintained as an individual file and can be placed in a
folder (directory) of choice.
Graphical mail clients, such as Thunderbird 2.x or Outlook
Express 6, are a convenient way to check your
e-mail, and are the preferred alternative to
Berkeley mail and Pine. See
http://www.helpdesk.umd.edu/documents/0/690 for more
information about which client would work best for
you.
Back to table of contents
Getting Help
On-line help is available via the man command. From the
UNIX prompt, type man
mail to view the on-line manual entry for the mail
program.
Documents on the basics of the three OIT-supported text
editors, Using the Vi Text
Editor, Using the Emacs Text
Editor, and Using the Pico Text
Editor are available on-line.
Back to table of contents
Please contact the OIT Help Desk if
you have any questions or concerns.
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