Tuesday, July 15, 2014

Filtering based on Envelope Sender

Policy daemon for Postfix, Sendmail and Zimbra, it allows MTA to check and modify mail envelope information, message MIME headers, and message body. It adds disclaimers, sent auto replies, strip attachments, block messages and rate limit outgoing emails.

Envelope Sender condition


An email message hat two addresses associated with sending it, the envelope sender, and the From address. The envelope sender is used by mail servers and From address is used by people. In most cases mail clients shows only From address, because the envelope sender and the From address should match. But they don't always, and they don't have to.

Evenlope Sender condition/exception.


Match envelope sender with Wildcards or Regular Expressions, it gives a wide range of email address match possibilities. Ie. *@gmail.com will match all messages which are sent from gmail.com.

Server side rules


MSH Traffic Policy is a sophisticated mail filter for Zimbra, Postfix and Sendmail, which extends MTA functionality with powerful server side rules. If you need to take control over mail flow read more about MSH Traffic Policy...