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)