NAME

     smtpping — SMTP benchmarking and measurement tool

SYNOPSIS

     smtpping [-dqrJ46] [-p port] [-w wait] [-c count] [-P parallel] [-s size] [-f file]
              [-H hello] [-S sender] recipient [@server]

DESCRIPTION

     smtpping is a small tool that performs SMTP server delay, delay variation and throughput
     measurements.

     It must be invoked with the recipient email address. Normally, the server should also be
     specified (prefixed with @); otherwise smtpping will try to find the recipient domain's MX
     record, falling back on A/AAAA records.

     The following options are available:

     -4      Use IPv4.

     -6      Use IPv6.

     -p port
             Specifies the TCP port to use (default: 25).

     -w wait
             Time in milliseconds to wait between pings (default: 1000).

     -c count
             Number of pings to send (default: unlimited).

     -P processes
             Number of parallel worker processes (default: 1). To measure throughput, it's
             recommended to use -r and -w0 with this option.

     -s size
             Ping message size in kilobytes (default: 10). Cannot be used in conjunction with the
             -f option.

     -f file
             Send the specified email file (message/rfc822) instead of a generated message.
             Cannot be used in conjunction with the -s option.

     -H helo
             HELO name (default: localhost.localdomain).

     -S sender
             Sender address (default: <>).

     -r      Display rate instead of transaction delays. To measure throughput, it's recommended
             to use -w0 and possibly -P with this option.

     -q      Display less verbose output.

     -d      Display more verbose output.

AUTHORS

     The smtpping program was written by Anders Berggren <anders@desh.se> and Erik Lax
     <erik@datahack.se> for Halon Security AB.