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Requirements for the Milter MTA Agent

The Milter MTA agent has been tested using the Linux and Sendmail combinations listed below. The Milter MTA agent may work with other combinations, but these have not been tested.

Linux

The Milter MTA agent has been tested on the following systems:

Sendmail

The Milter MTA agent supports Sendmail 8.13.0 or later (but see below).

We have also successfully connected a Milter MTA agent to Sendmail running on a remote Solaris server.

Milter API Library requirements

During installation, the Milter MTA agent checks for the presence of the Milter API shared library, libmilter.so. If this library is not present, the Milter MTA agent uses a statically compiled libmilter (version 8.13.8), compatible with all versions of Sendmail from 8.13.0 onwards.

But if libmilter.so is already present, the Milter MTA agent uses this library. However, due to a known issue with the Milter API, the agent may not work with libmilter.so 8.14.0 or 8.14.1 (this issue is fixed in version 8.14.2 and later).

Postfix

The Milter MTA agent integrates with any version of Postfix that supports the Sendmail Milter API as specified under http://www.postfix.org/MILTER_README.html.