This article refers to the Barracuda Message Archiver firmware version 5.0 and higher, and Unix Mail Servers including Apple Mail Server, Sendmail, Postfix, and qmail.
You can configure Sendmail, Postfix, and qmail to forward a copy of all incoming and outgoing messages as a blind-carbon-copy (bcc) to your Barracuda Message Archiver IP address. Sendmail, Postfix, and qmail support most Unix operating systems including Mac OS X.
For more information, refer to the Barracuda Networks Knowledgebase Solution #00003036 How should I configure the Barracuda Message Archiver to work with Unix mail servers like Sendmail, Postfix, or qmail?
For Postfix, you can use the configuration parameter always_bcc to forward a copy of all incoming and outgoing messages as a bcc. For more information, refer to Postfix Configuration Parameters.
Adding a Milter
For best handling of journal mail from Postfix and Sendmail, consider adding a milter (mail filter) so that journaled email has a full journal envelope. Use the following resources to assist in preparation of a milter specific to your environment: