TH MAIL 1
SH NAME
mail, marshal, nedmail, send, aliasmail, smtp, smtpd, vwhois, filter, fs, biff, pop3 \-  mail commands
SH SYNOPSIS
B mail
[
I arg ...
]
PP
B upas/marshal
[
B -t
I mime-type
]
[
B -[aA]
I attachment
]
[
B -s
I subject
]
[
B -r
]
[
B -x
]
[
B -#
]
[
B -n
]
[
I mailaddr ...
]
PP
B upas/send
[
B -b
]
[
B -i
]
[
B -r
]
[
B -x
]
[
B -#
]
[
B -n
]
[
I mailaddr ...
]
PP
B upas/nedmail
[
B -c [dir]
]
[
B -r
]
[
B -f
I mailfile
]
[
B -s
I mailfile
]
PP
B upas/fs
[
B -f
I mailbox
]
[
B -b
]
[
B -n
]
[
B -p
]
PP
B upas/biff
PP
B upas/filter
[
B -bh
]
I rcvr
I mailbox
I "regexp file
[
I "regexp file
]*
PP
B upas/pop3
SH DESCRIPTION
SS Mail
Mail is a shell script that invokes
I upas/nedmail
when no  recipients appear on the command line and
I upas/marshal
otherwise.
All command line options are passed through.
SS "Sending mail
I Marshal
builds a mail message from standard input and passes it to
I send
for transmission or delivery.
It adds to the beginning of the message any headers in the file
BI /mail/box/ username /headers\f1.
This allows the addition of personal headers like
B From:
lines with a full name or a different
return address.
The message format is both RFC 822 and
MIME conformant, so
I marshal
adds any required headers not already in the message.
Command line options direct marshal to add a subject line
and append attachments.  The arguments to
I marshal
are the addresses of the recipients.
PP
When running in a
IR rio (1)
window,
I marshal
automatically puts the window into hold mode (see
IR rio (1));
this means that the message can be edited freely,
because nothing will be sent to
I marshal
until the ESC key is hit to exit hold mode.
PP
The options are:
TF "-a file"
TP
BI -a file
directs
I marshal
to append
I file
as a mime attachment.
Unless explicitly specified by the
B -t
option, the type of the attachment is determined
by running the
IR file (1)
command.
TP
BI -A file
is like
B -a
but the message disposition is marked as
I inline
directing any mail reader to display the attachment
(if it can) when the mail message is read.
TP
BI -t type
sets the content type for the attachments from
all subsequent
B -a
and
B -A
options.
TP
BI -s subject
adds a
B Subject:
header line to the message if one does not
already exist.
TP
B -#xnr
are all passed as command line options to the
I send
that
I marshal
invokes.
PD
PP
I Send
reads a message from standard input and disposes of it in one
of four ways:
IP \(bu 3
If
I mailaddr
refers to a local mailbox, it appends it to the
recipient's mailbox.
IP \(bu
If
I mailaddr
is remote, it queues the mail for remote delivery.
IP \(bu
If the
B -r
option is given and the mail is undeliverable, it
returns the mail to the sender.
IP \(bu
if the
B -r
option is not given and the mail is undeliverable, it
appends the mail to
BI /mail/box/ username /dead.letter
and prints a message to standard error.
PP
The file
B /mail/lib/rewrite
determines exactly how to deliver or queue the mail.
The decision is based purely on the recipient address.
PP
The options are:
TF -b
TP
B -b
suppresses the addition of the
B To:
line.
TP
B -i
let the message input be terminated by a line
containing only a period, for
compatibility with
old mailers.
TP
B -x
do not send mail, but instead report
the full mail address of the recipient.
TP
B -#
do not send mail, but instead report
what command would be used to send the mail.
TP
B -r
input is via a pipe from another program.
Expect a From
line at the start of the message to provide the
name of the sender and timestamp.  This implies
the
B -b
option.
SS "Reading mail"
I Nedmail
edits a mailbox.
The default mailbox is
BI /mail/box/ username /mbox\f1.
The
B -f
command line option specifies an alternate mailbox.
Unrooted path names are interpreted relative to
BI /mail/box/ username.
If the
I mailfile
argument is omitted, the name defaults to
BR stored .
PP
The options are:
TF "-f mailfile"
TP
BI -c " dir
Create a mailbox.  If
I dir
is specified, the new mailbox is created in
BI /mail/box/ username / dir /mbox\f1.
Otherwise, the default mailbox is created.
TP
B -r
Reverse: show messages in first-in, first-out order; the default is last-in, first-out.
TP
BI -f " mailfile"
Read messages from the specified file (see above) instead of the default mailbox.
TP
BI -s " mailfile"
Read a single message file
IR mailfile ,
as produced by
IR fs ,
and treat it as an entire mailbox.
This is provided for
use in plumbing rules; see
IR faces (1).
PD
PP
I Nedmail
starts by reading the mail box, printing out the number
of messages, and then prompting for commands from standard input.
Commands, as in
IR ed (1),
are of the form
RI `[ range ]
I command
RI [ arguments ]'.
The command is applied to each message in the (optional) range.
PP
The address range can be:
TP 1.4i
I address
to indicate a single message header
PD 0
TP
IB address , address
to indicate a range of contiguous message headers
TP
BI g/ expression /
to indicate all messages whose headers match the regular
IR expression .
TP
BI g% expression %
to indicate all messages whose contents match the regular
IR expression .
PD
PP
The addresses can be:
TP 1.4i
I number
to indicate a particular message
PD 0
TP
IB address . number
to indicate a subpart of a particular message
TP
BI / expression /
to indicate the next message whose header matches
I expression
TP
BI % expression %
to indicate the next message whose contents match
expression
TP
I "empty or .
to indicate the current message
TP
BI - address
to indicate backwards search or movement
PD
PP
Since messages in MIME are hierarchical
structures, in
I nedmail
all the subparts are individually addressable.
For example if message 2 contains 3 attachments,
the attachments are numbered 2.1, 2.2, and 2.3.
PP
The commands are:
TP 1.1i
BI a " args
Reply to all addresses in the
BR To: ,
BR From: ,
and
BR Cc:
header lines.
I Marshal
is used to format the reply and any arguments the
user specifies are added to the command line to
I marshal
before the recipient.
The possibility of making a fool of yourself is very
high with this command.
PD 0
TP
BI A " args
Like
B a
but with the message
appended to the reply.
TP
B b
Print the headers for the next ten messages.
TP
B d
Mark message to be deleted upon exiting
IR nedmail .
TP
B f
Append the message to the file
BI /mail/box/ username / sendername
where
I sendername
is the account name of the sender.
TP
B h
Print the disposition, size in characters, and header line of the message.
TP
B help
Print a summary of the commands.
TP
BI m " person ...
Forward the message as a mime attachment to the named
IR persons .
TP
BI M " person ...
Like
B m
but allow the user to type in text to be included
with the forwarded message.
TP
B p
Print message.  An interrupt stops the printing.
TP
BI r " args
Reply to the sender of the message.
I Marshal
is used to format the reply.
If and optional
I Args
are specified, they are added to the command line to
I marshal
before the recipient's address.
TP
B R " args
Like
B r
but with the original message included as an attachment.
TP
B rf
Like
B r
but append the message and the reply to the file
BI /mail/box/ username / sendername
where
I sendername
is the account name of the sender.
TP
B Rf
Like
B R
but append the message and the reply to the file
BI /mail/box/ username / sendername
where
I sendername
is the account name of the sender.
TP
BI s " mfile"
Append the message to the specified mailbox.
If
I mfile
doesn't start with a `/', it is interpreted relative to the directory in which the mailbox resides.
TP
B q
Put undeleted mail back in the mailbox and stop.
TP
EOT (control-D)
Same as
BR q .
TP
BI w " file
Same as
B s
with the mail header line(s) stripped.  This can be used to
save binary mail bodies.
TP
B u
Remove mark for deletion.
TP
B x
Exit, without changing the mailbox file.
TP
BI | command
Run the
I command
with the message as standard input.
TP
BI ! command
Escape to the shell to do
IR command .
TP
B \&=
Print the number of the current message.
PD
PP
Here's an example of a mail session that looks at a summary
of the mail messages, saves away an html file added as an
attachment to a message and then deletes the message:
LP
EX
% mail
7 messages
: ,h
1        mul  4410      Jul 22 12:30  [email protected]  "Add Up To 2
1.1      txt  1413
1.2      html  1966
2        txt   504      Jul 22 11:43  jmk
3        mul   784      Jul 20 09:05  presotto
3.1      txt   136
3.2      txt   323      Jul 12 16:16  presotto
4        txt   822      Jul 11 09:23  [email protected]  "You don't call, you don
5        txt   193       Jul 6 16:55  presotto
6        txt   529       May 7 19:42  jmk
7        txt   798       Sep 2 13:55  howard
: 1.2w /tmp/northwest.html
!saved in /tmp/northwest.html
1.2: d
1: q
!1 message deleted
%
EE
PP
Notice that the delete of message 1.2 deleted the entire message and
not just the attachment.
SS "Aliasmail"
I Aliasmail
expands mail aliases, its arguments, according to alias files.
Each line of an alias file begins with
B #
(comment) or with a name.
The rest of a name line gives the expansion.
The expansion may contain multiple addresses and may be continued
to another line by appending a backslash.
Items are separated by white space.
PP
In expanding a name, the sender's personal alias file
BI /mail/box/ username /names
is checked first.
Then the system alias files, listed one per line in
BR /mail/lib/namefiles  ,
are checked in order.
If the name is not found, the expansion is taken to be
BI local! name\f1.
Under the
B -f
option,
alias files listed in
B /mail/lib/fromfiles
are consulted instead,
and the domain part only of the expansion is printed.
SS Mailboxes
Incoming mail for a user
I username
is put in the file
BI /mail/box/ username /mbox
unless either the file
BI /mail/box/ username /forward
or
BI /mail/box/ username /pipeto
exists.
The mailbox must have append-only and exclusive-access mode
(see
IR chmod (1)).
A user must create his or her own mailbox using the
B -c
option of
IR nedmail .
Mailboxes are created writable (append-only) but not readable by others.
SS Forwarding
If the file
BI /mail/box/ username /forward
exists and is readable by everyone, incoming mail
will be forwarded to the addresses contained in the first line of the file.
The file may contain multiple addresses.
Forwarding loops are caught and resolved by local delivery.
SS Filtering
If the file
BI /mail/box/ username /pipeto
exists and is readable and executable by everyone,
it will be run for each incoming message for the user.
The message will be piped to it rather
than appended to his/her mail box.
The file is run as user
B none
with arguments of the resolved address of
I username
(e.g.
BR local!presotto )
and his/her mail box name.
PP
I Filter
provides simple mail filtering.
The first two arguments are the recipient's address and mailbox, i.e.,
the same arguments provided to
BR pipeto .
The remaining arguments are all paired; a regular expression and a file name.
With no flags, the sender's address is matched against each
regular expression starting with the first.  If the expression
matches, then the message is delivered to the file whose name
follows the expression.  The file must be world writable and should
be append only.
A message that matches none of the expressions is delivered into
the user's standard mail box.
The flags are:
TP
B h
the regular expression is matched against the message header
rather than the address.
TP
B b
the regular expression is matched against both the header and the body
of the message.
PP
For example, to delete any messages of precedence bulk, place in
your
B pipeto
file:
EX
/bin/upas/filter -h $1 $2 'Precedence: bulk' /dev/null
EE
SS "Mime File system
PP
I Fs
is a user level file system that reads mailboxes and presents them as a file
system.
A user normally starts
I fs
in his/her profile after starting
IR plumber (4)
and before starting
a window system, such as
IR rio (1)
or
IR acme (1).
The file system is used by
I nedmail
and
IR acme (1)'s
mail reader to parse messages.
I Fs
also generates plumbing messages used by
IR biff
and
IR faces (1)
to provide mail announcements.
PP
The mailbox itself becomes a directory under
BR /mail/fs .
Each message in the mailbox becomes a numbered directory in the
mailbox directory, and each attachment becomes a numbered directory
in the message directory.  Since an attachment may itself be a mail message,
this structure can recurse ad nauseam.
PP
Each message and attachment directory contains the files:
TP 1.4i
B body
PD 0
the message minus the RFC822 style headers
TP
B cc
the address(es) from the CC: header
TP
B date
the date in the message, or if none, the time of delivery
TP
B digest
an SHA1 digest of the message contents
TP
B disposition
B inline
or
B file
TP
B filename
a name to use to file an attachment
TP
B from
the from address in the From: header, or if none,
the address on the envelope.
TP
B header
the RFC822 headers
TP
B info
described below, essentially a summary of the header info
TP
B inreplyto
contents of the
B in-reply-to:
header
TP
B mimeheader
the mime headers
TP
B raw
the undecoded MIME message
TP
B rawbody
the undecoded message body
TP
B rawheader
the undecoded message header
TP
B replyto
the address to send any replies to.
TP
B subject
the contents of the subject line
TP
B to
the address(es) from the To: line.
TP
B type
the MIME content type
TP
B unixheader
the envelope header from the mailbox
PD
PP
The
B info
file contains the following information, one item per line.  Lists
of addresses are single space separated.
IP
TP 2i
I "sender address
PD 0
TP
I "recipient addresses
TP
I "cc addresses
TP
I "reply address
TP
I "envelope date
TP
I "subject
TP
I "MIME content type
TP
I "MIME disposition
TP
I filename
TP
I "SHA1 digest
TP
I "bcc addresses
TP
I "in-reply-to: contents
TP
I "RFC822 date
TP
I "message senders
TP
I "message id
TP
I "number of lines in body
PD
PP
Deleting message directories causes the message to be removed from
the mailbox.
PP
The mailbox is reread and the structure updated
whenever the mailbox changes.  Message directories are
not renumbered.
PP
The file
B /mail/fs/ctl
is used to direct
I fs
to open/close new mailboxes or to delete groups of messages atomically.
The messages that can be written to this file are:
TP 2i
PD 0
B "open \fIpath mboxname\fP
opens a new mailbox.
I path
is the file to open, and
I mboxname
is the name that appears under
BR /mail/fs .
TP
B "close \fImboxname\fP
close
IR mboxname .
The close takes affect only after all files open under
BI /mail/fs/ mboxname
have been closed.
TP
B "delete \fImboxname number ...\fP
Delete the messages with the given numbers from
IR mboxname.
PD
PP
The options are:
TF "-f file
TP
BI -f file
use
I file
as the mailbox instead of the default,
BI /mail/box/ username /mbox.
PD 0
TP
B -b
stands for biffing.  Each time new mail
is received, a message is printed to standard
output containing the sender address, subject,
and number of bytes.  It is intended for
people telnetting in who want mail announcements.
TP
B -n
Don't open a mailbox initially.  Overridden by -f.
TP
B -p
turn off plumbing.  Unless this is specified,
I fs
sends a message to the plumb port,
BR seemail ,
from source
B mailfs
for each message received or deleted.
The message contains the attributes
IR sender = "<contents of from file>" ,
IR filetype =mail,
IR mailtype = "deleted or new" ,
and
IR length = "<message length in bytes>" .
The contents of the message is the full path
name of the directory representing the message.
TP
B -s
causes
I fs
to put itself in
B /srv
with a name of the form
BR /srv/upasfs.\fIuser\fB .
TP
B -m
specifies a mount point other than
BR /mail/fs .
PD
PP
I Fs
will exit once all references to its directory
have disappeared.
SS "Mail Announcements
PP
I Biff
is the textual equivalent of
IR faces (1).
It listens to plumbing messages from
I fs
and for each new message prints to standard output a line
containing the sender address, subject,
and number of bytes.
It exists for people without graphics capability or with screens too small to
dedicate the space
IR faces (1)
requires.  It forks to place itself in the background.
SS "Remote delivery
PP
I Smtp
sends the mail message from standard input
to the users
I rcpt-list
on the host at network address
I address
using the Simple Mail Transfer Protocol.
The return address of the mail will contain the local
system name from the environment variable
I sysname
and the user
IR sender .
The
B -h
option uses
I host
as the local system name;
it may be fully-qualified or not.
If
I .domain
is given, it is appended to the end of the system name.
The
B -f
option just prints out the converted message rather than
sending it to the destination.
The
B -g
option specifies a gateway system to pass the message to if smtp can't
find an address or MX entry for the destination system.
The
B -d
option turns on debugging output to standard error.
PP
I Smtpd
receives a message using the Simple Mail Transfer Protocol.
Standard input and output are the protocol connection.
PP
The options are:
TP 1.1i
B -d
turns on debugging output to standard error.
TP
B -r
turns on forward DNS validation of non-trusted sender address.
TP
B -f
prevents relaying from non-trusted networks.
TP
B "-n \fItcp-directory\fP"
specifies the name of the network directory assigned to the incoming connection.
This is used to determine the peer IP address.  If this flag is not
specified, the peer address is determined using standard input.
TP
B "-h \fIdomain\fP"
specifies the receiving domain.  If this flag is not specified, the
receiving domain is inferred from the host name.
TP
B -s
causes copies of blocked messages to be saved in a sub-directory of
BR /mail/queue.dump .
TP
B "-k \fIIP address\fP"
causes connections from the host at
I "IP address"
to be dropped at program startup.  Multiple addresses
can be specified with several
B -k
options.  This option should be used carefully;
it is intended to lessen the effects of denial of
service attacks or broken mailers which continually
connect.  The connections are not logged and the
remote system is not notified via the protocol.
PP
I Smtpd
is normally run by a network listener such as
IR listen (8).
Most of the command line options are more conveniently
specified in the smtpd configuration file stored in
BR /mail/lib/smtpd.conf .
SS "Mail server
I Pop3
is a rudimentary POP3 server that uses APOP for authentication.
It predates
I upas/fs
and does not use it.  It will soon be replaced by one that uses
IR upas/fs .
See also the IMAP4 server described in
IR ipserv (8).
SH FILES
TF /mail/box/*/dead.letter
TP
B /sys/log/mail
mail log file
TP
B /mail/box/*
mail directories
TP
B /mail/box/*/mbox
mailbox files
TP
B /mail/box/*/forward
forwarding address(es)
TP
B /mail/box/*/pipeto
mail filter
TP
B /mail/box/*/L.reading
mutual exclusion lock for multiple mbox readers
TP
B /mail/box/*/L.mbox
mutual exclusion lock for altering mbox
TP
B /mail/box/*/dead.letter
unmailable text
TP
B /mail/box/*/names
personal alias files
TP
B /mail/lib/rewrite
rules for handling addresses
TP
B /mail/lib/namefiles
lists files to search for aliases in
TP
B /lib/face/48x48x?
directories of icons for
I seemail
SH SOURCE
TF /sys/src/cmd/upas
TP
B /rc/bin/mail
TP
B /sys/src/cmd/upas
source for commands in
B /bin/upas
TP
B /sys/src/cmd/faces
TP
B /rc/bin/vwhois
SH "SEE ALSO"
IR face (6),
IR rewrite (6)
IR ipserv (8)
SH BUGS
I Nedmail
truncates
long headers for searching.
sp
br
I Biff
and
the
B \-b
option of
I fs
perform the same function but in slightly
different environments.
The duality is confusing.
The
B \-b
option exists because starting both
I fs
and
I biff
in a Telnet session results in a number
of processes that don't die when the
session is terminated; the
IR plumber (4)
is held open by
I fs
and
I biff
still having it mounted, while
I fs
is held open by
I biff
which is blocked waiting for plumbing
input.

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