Configuring the Milter protocol for Sendmail

Article:HOWTO59382  |  Created: 2011-10-04  |  Updated: 2011-10-04  |  Article URL http://www.symantec.com/docs/HOWTO59382
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How To


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Configuring the Milter protocol for Sendmail

Verify if the Milter protocol is supported. If not, follow the procedures To verify if you have Milter support enabled. These steps add the necessary lines to the build configuration file in the Sendmail directory and build a new version of Sendmail.

If you have problems when you build and configure Sendmail, on the Internet, go to the following URL:

https://www.milter.org/developers/installation

If you do not have the Sendmail source, you can find it on the Sendmail Web site. On the Internet, go to the following URL:

http://www.sendmail.org

To verify if you have Milter support enabled

  • Type the following command:

    /usr/lib/sendmail -bt -d0 < /dev/null

    If you see a reference to MILTER, then your Sendmail installation has the required Milter support, and you can skip this section.

To compile Sendmail 8.12 to use external mail filters

  1. Log on as root.

  2. Change to your base Sendmail directory and open the build configuration file (located at devtools/Site/site.config.m4).

    You can create this file if it does not exist.

  3. Add the following line:

    APPENDDEF('conf_sendmail_ENVDEF', '-DMILTER')

    Save your changes to the build configuration file.

  4. In the Sendmail directory, type the following to build Sendmail 8.12 with the new settings:

    sh Build -c
  5. To verify external filter support, type the following:

    /usr/lib/sendmail -bt -d0 < /dev/null

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