To Modify the option.dat and imta.cnf Files

1. Modify the option.dat file as follows.

   Here the Symantec Brightmail client is located under the /SYMSDK/BSDK directory.

   ! ! Brightmail Stuff ! spamfilter1_config_file=/SYMSDK/BSDK/etc/bmiconfig_client.xml spamfilter1_library=/SYMSDK/BSDK/lib/libbmiclient.so

   Consider also setting SPAMFILTER1_OPTIONAL=-2 (or SPAMFILTERn_OPTIONAL=-2, as appropriate) in the option.dat file. If the MTA encounters an error contacting Symantec Brightmail, then in addition to temporarily rejecting incoming SMTP messages, the MTA will also generate a syslog notice. For syslog notices to be routed appropriately, you might also need to adjust the SNDOPR_PRIORITY option.dat option and your syslog.conf file.

2. Modify the imta.cnf file as follows.

   Symantec Brightmail scanning can be selected in the MTA in a variety of ways, including via use of a per-user LDAP attribute, or via use of a per-domain LDAP attribute, or according to source or destination channel. A typical usage is to perform Symantec Brightmail scanning on all messages destined to locally hosted users: that is, on all messages being delivered to users via an ims-ms channel, or via tcp_lmtp* client channels. For instance, to trigger Symantec Brightmail “spam” filtering on all messages being delivered to the store via the ims-ms channel, if Symantec Brightmail is being used as spam/virus filter package # 1, add destinationspamfilter1optin spam to the ims-ms channel definition in the imta.cnf file. Such a channel definition might then look something like the following:

   ! ims-ms ims-ms defragment subdirs 20 notices 1 7 14 21 28 \ backoff "pt5m" "pt10m" "pt30m" "pt1h" "pt2h" "pt4h" \ maxjobs 2 pool IMS_POOL fileinto $U+$S@$D \ destinationspamfilter1optin spam ims-ms-daemon

3. Compile the MTA configuration.

   ./imsimta cnbuild

4. Restart the MTA dispatcher.

   imsimta restart dispatcher

   This will cause use of the new compiled configuration (enabling Symantec Brightmail use) by the MTA's (new) SMTP server processes.