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.
-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 Dont 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 Dont 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: dont send HELO, and dont 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