---
name: "smtp-source"
section: "8postfix"
platform: "linux"
package: "postfix"
version: "2.1.5-9"
release: "Debian 3.1 (Sarge)"
platforms: ["linux"]
url: "https://new.carta.tech/smtp-source/8postfix"
---

# smtp-source(8postfix)

multi-threaded SMTP/LMTP test generator

## 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 servers. IPV4 is the default.

Arguments:

- **-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\>).

- **-o**

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

- **-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).

- **-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.

- **-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\>).

- **-R** *interval*

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

- **-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
```