SMTP-SOURCE

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

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

smtp-source [options] unix:pathname

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.

No SMTP command pipelining support.

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

The Secure Mailer license must be distributed with this software.

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