NAME

       smtp-source - parallelized 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

       Wietse Venema
       Google, Inc.
       111 8th Avenue
       New York, NY 10011, USA

                                                                                   SMTP-SOURCE(1)