Symantec BRIGHTMAIL Installation Guide - Page 23

Enable Sendmail External Filtering, undermine Symantec Brightmail AntiSpam's effectiveness.

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Installing Brightmail Scanner for Sendmail over a secure connection. Consequently, TCP port 443 must be configured to allow outbound connections. NOTE: Symantec Brightmail AntiSpam's ability to identify spam accurately depends on having access to messages in their original form. Software and hardware which modify message headers and/or the content or structure of message bodies may undermine Symantec Brightmail AntiSpam's effectiveness. Enable Sendmail External Filtering Your Sendmail installation must have support enabled for the Mail Filter API (Milter). Milter is necessary to support external mail filters, such as the Brightmail Filter. To verify if you have Milter support enabled, type the following command: /usr/lib/sendmail -bt -d0 < /dev/null The system displays text similar to the following: Version 8.12.11 Compiled with: DNSMAP LOG MAP_REGEX MATCHGECOS MILTER MIME7TO8 MIME8TO7 NAMED_BIND NDBM NETINET NETINET6 NETUNIX NIS NISPLUS PIPELINING SCANF XDEBUG If you see a reference to MILTER, then your Sendmail installation has the required Milter support and you can skip this section. Otherwise, follow the steps below to add the necessary lines to the build configuration file in the Sendmail directory and build a new version of Sendmail. If you have problems building and configuring Sendmail, refer to the following configuration document: http://www.milter.org/milter_api/installation.html. If you do not have the Sendmail source, you can find it on the Sendmail Web site: http://www.sendmail.org. NOTE: For more information on setting up Sendmail see "Configuring Sendmail for the Brightmail Filter," on page 33. To compile Sendmail 8.12 to use external mail filters: 1 Log in 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 doesn't exist. 3 Add the following line: APPENDDEF(`conf_sendmail_ENVDEF', `-DMILTER') 4 Save your changes to the build configuration file. Installation Guide 17

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Installing Brightmail Scanner for Sendmail
Installation Guide
17
over a secure connection. Consequently, TCP port 443 must be configured to allow
outbound connections.
NOTE:
Symantec Brightmail AntiSpam’s ability to identify spam accurately depends on
having access to messages in their original form. Software and hardware which
modify message headers and/or the content or structure of message bodies may
undermine Symantec Brightmail AntiSpam’s effectiveness.
Enable Sendmail External Filtering
Your Sendmail installation must have support enabled for the Mail Filter API (Milter).
Milter is necessary to support external mail filters, such as the Brightmail Filter.
To verify if you have Milter support enabled, type the following command:
The system displays text similar to the following:
If you see a reference to
MILTER
, then your Sendmail installation has the required Milter
support and you can skip this section.
Otherwise, follow the steps below to add the necessary lines to the build configuration file
in the Sendmail directory and build a new version of Sendmail. If you have problems
building and configuring Sendmail, refer to the following configuration document:
. If you do not have the
Sendmail source, you can find it on the Sendmail Web site:
.
NOTE:
For more information on setting up Sendmail see
“Configuring Sendmail for the
Brightmail Filter,” on page 33
.
To compile Sendmail 8.12 to use external mail filters:
1
Log in 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 doesn’t exist.
3
Add the following line:
4
Save your changes to the build configuration file.
/usr/lib/sendmail -bt -d0 < /dev/null
Version 8.12.11
Compiled with: DNSMAP LOG MAP_REGEX MATCHGECOS MILTER MIME7TO8 MIME8TO7
NAMED_BIND NDBM NETINET NETINET6 NETUNIX NIS NISPLUS
PIPELINING SCANF XDEBUG
APPENDDEF(`conf_sendmail_ENVDEF', `-DMILTER')