Filtering based on envelope sender

Policy daemon for Postfix and Zimbra, it allows MTA to check and modify mail envelope information, message MIME headers, and message body. It adds disclaimers, sends auto replies, strips attachments, blocks messages and rate limits outgoing emails.

Envelope Sender condition

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

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.

To learn more visit MSH Traffic Policy website.