On Apache/2.4.6 (CentOS)
Under GNU General Public License
2025-06-23 22:07 @127.0.0.1 CrawledBy Wget/1.21.2
SSMTP(8) System Manager's Manual SSMTP(8)
NAME
ssmtp, sendmail - send a message using smtp
SYNOPSIS
ssmtp [ flags ] [ address ... ]
/usr/lib/sendmail [ flags ] [ address ... ]
DESCRIPTION
ssmtp is a send-only sendmail emulator for machines which normally pick their mail up from
a centralized mailhub (via pop, imap, nfs mounts or other means). It provides the func-
tionality required for humans and programs to send mail via the standard or /usr/bin/mail
user agents.
It accepts a mail stream on standard input with recipients specified on the command line
and synchronously forwards the message to the mail transfer agent of a mailhub for the
mailhub MTA to process. Failed messages are placed in dead.letter in the sender's home
directory.
Config files allow one to specify the address to receive mail from root, daemon, etc.; a
default mailhub; a default domain to be used in From: lines; per-user From: addresses and
mailhub names; and aliases in the traditional format used by sendmail for the /etc/aliases
file.
It does not attempt to provide all the functionality of sendmail: it is intended for use
where other programs are the primary means of at last mail delivery. It is usefull with
pop/imap, or to simulate the Sun shared mail spool option for non-Sun machines, for
machines whose sendmails are too difficult (or various) to configure, for machines with
known disfeatures in their sendmails or for ones where there are ``mysterious problems''.
It does not honor .forwards, which have to be done on the recieving host. It especially
does not deliver to pipelines.
OPTIONS
Most sendmail options are irrelevent to sSMTP. Those marked ``ignored'' or ``default''
have no effect on mail transfer. Those marked ``unsupported'' are fatal errors. Those
marked ``simulated'' are not errors, but the result is for the program to exit with an
informative message. A sort of fatal non-error.
-4 Forces ssmtp to use IPv4 addresses only.
-6 Forces ssmtp to use IPv6 addresses only.
-auusername
Specifies username for SMTP authentication.
-appassword
Specifies password for SMTP authentication.
-ammechanism
Specifies mechanism for SMTP authentication. (Only LOGIN and CRAM-MD5)
-ba (unsupported) ARPANET mode. All input lines must end with a LINEFEED, and all mes-
sages will be generated with a CR-LF at the end. Also, the ``From:'' and
``Sender:'' fields are examined for the name of the sender.
-bd (unsupported) Run as a daemon.
-bi (ignored) Initialise the alias database.
-bm (default) Deliver mail in the usual way.
-bp (simulated) Print a summary of the mail queue.
-bs (unsupported) Read SMTP commands from stdin.
-bt (unsupported) Run in address test mode.
-bv (unsupported) Verify names only.
-bz (unsupported) Create the configuration freeze file.
-Cfile Use alternate configuration file.
-dX Set debugging value to X.
-E (ignored) Don't trust userid of sender.
-Ffullname
Set the full name of the sender.
-fname Sets the name of the ``from'' person. This option is valid only if no From: line is
specified within the header of the email.
-h (ignored) Set the hop count to N.
-m (ignored) Ignore originator in alias.
-Mid (ignored) Attempt to deliver the queued message with message-id id.
-N dsn (ignored) Set delivery status notification conditions to dsn.
-n (default) Do not do aliasing.
-oAfile
(ignored) Use alternate alias file.
-oc (ignored) Delay ``expensive'' connections.
-od (ignored) Set the delivery mode to interactive/synchronous, background or queue
(Always interactive).
-oD (ignored) Run newaliases if required.
-oe (ignored) Set error processing to mail, write, print or quit. (Always print).
-oFmode
(ignored) The mode to use when creating temporary files.
-of (ignored) Save UNIX-system-style ``From'' lines at the front of messages.
-ogN (ignored) Set group ID to use when calling mailers.
-oHfile
(ignored) Set SMTP help file.
-oi (default) Do not take dots on a line by themselves as a message terminator.
-oLn (ignored) The log level.
-om (default) Send to ``me'' (the sender) also if in an alias.
-oo (unsupported) If set, this message may have old style headers.
-oQqueuedir
(ignored) Select the directory in which to queue messages.
-ortimeout
(ignored) The timeout on reads.
-oSfile
(ignored) Save statistics in the named file.
-os (ignored) Always instantiate the queue.
-oTtime
(ignored) Set timeout on messages.
-otstz,dtz
(ignored) Set the name of the time zone.
-ouN (ignored) Set the default user id for mailers.
-q[time]
(simulated) Process the queue.
-rname Same as -f.
-Rstring
(ignored) Process queue for recipient.
-R return
(ignored) Set the amount of the message to be returned if the message bounces.
-t Read message, searching for recipients. ``To:'', `Cc:'', and ``Bcc:'' lines will
be scanned for people to send to. Any addresses in the argument list will be
suppressed (not supported).
-v Go into verbose mode.
-V Say version and quit.
REVERSE ALIASES
A reverse alias gives the From: address placed on a user's outgoing messages and (option-
ally) the mailhub these messages will be sent through. Example:
root:jdoe AT isp.com:mail.isp.com
Messages root sends will be identified as from jdoe AT isp.com and sent through mail.isp.com.
FILES
/etc/ssmtp/ssmtp.conf - configuration file
/etc/ssmtp/revaliases - reverse aliases file
/etc/aliases - aliases file
SEE ALSO
RFC821, RFC822, ssmtp.conf(5).
AUTHORS
Matt Ryan (mryan AT debian.org) Hugo Haas (hugo AT debian.org) Christoph Lameter (clame-
ter AT debian.org) Dave Collier-Brown (davecb AT hobbes.org)
BUGS
sSMTP does not support exception lists to the -t option (never seen it used).
sSMTP will fail if the mailhub is unreachable.
Last change: 4 February 2005 SSMTP(8)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache/2.4.6 (CentOS)
Under GNU General Public License
2025-06-23 22:07 @127.0.0.1 CrawledBy Wget/1.21.2