NAME

       smtp-source - multi-threaded SMTP/LMTP test generator

SYNOPSIS

       smtp-source [options] [inet:]host[:port]

       smtp-source [options] unix:pathname

DESCRIPTION

       smtp-source  connects to the named host and TCP port (default: port 25) and sends one or more messages to
       it, either sequentially or in parallel. The program speaks either SMTP (default)  or  LMTP.   Connections
       can be made to UNIX-domain and IPv4 or IPv6 servers.  IPv4 and IPv6 are the default.

       Note:  this  is  an  unsupported  test  program.  No  attempt  is  made to maintain compatibility between
       successive versions.

       Arguments:

       -4     Connect to the server with IPv4. This option has no effect when  Postfix  is  built  without  IPv6
              support.

       -6     Connect  to  the server with IPv6. This option is not available when Postfix is built without IPv6
              support.

       -A     Don't abort when the server sends something other than the expected positive reply code.

       -c     Display a running counter that is incremented each time an SMTP DATA command completes.

       -C count
              When a host sends RESET instead of SYN|ACK, try count times before giving up. The default count is
              1. Specify a larger count in order to work around a problem with TCP/IP  stacks  that  send  RESET
              when the listen queue is full.

       -d     Don't disconnect after sending a message; send the next message over the same connection.

       -f from
              Use the specified sender address (default: <foo@myhostname>).

       -F file
              Send  the pre-formatted message header and body in the specified file, while prepending '.' before
              lines that begin with '.', and while appending CRLF after each line.

       -l length
              Send length bytes as message payload. The length does not include message headers.

       -L     Speak LMTP rather than SMTP.

       -m message_count
              Send the specified number of messages (default: 1).

       -M myhostname
              Use the specified hostname or [address] in  the  HELO  command  and  in  the  default  sender  and
              recipient addresses, instead of the machine hostname.

       -N     Prepend a non-repeating sequence number to each recipient address. This avoids the artificial 100%
              hit rate in the resolve and rewrite client caches and exercises the trivial-rewrite daemon, better
              approximating Postfix performance under real-life work-loads.

       -o     Old mode: don't send HELO, and don't send message headers.

       -r recipient_count
              Send  the  specified  number  of  recipients  per  transaction  (default: 1).  Recipient names are
              generated by prepending a number to the recipient address.

       -R interval
              Wait for a random period of time 0 <= n <= interval between messages.  Suspending one thread  does
              not affect other delivery threads.

       -s session_count
              Run the specified number of SMTP sessions in parallel (default: 1).

       -S subject
              Send mail with the named subject line (default: none).

       -t to  Use the specified recipient address (default: <foo@myhostname>).

       -T windowsize
              Override  the  default  TCP window size. To work around broken TCP window scaling implementations,
              specify a value > 0 and < 65536.

       -v     Make the program more verbose, for debugging purposes.

       -w interval
              Wait a fixed time between messages.  Suspending one thread does not affect other delivery threads.

       [inet:]host[:port]
              Connect via TCP to host host, port port. The default port is smtp.

       unix:pathname
              Connect to the UNIX-domain socket at pathname.

BUGS

       No SMTP command pipelining support.

SEE ALSO

       smtp-sink(1), SMTP/LMTP message dump

LICENSE

       The Secure Mailer license must be distributed with this software.

AUTHOR(S)

       Wietse Venema
       IBM T.J. Watson Research
       P.O. Box 704
       Yorktown Heights, NY 10598, USA

                                                                                                  SMTP-SOURCE(1)