I'm trying to create a Content Filter for the recipient of the email. What I've tried so far is...
Filter: Header Filter
Regexp. Pattern: /^To: email@example.com
What I'm wanting this to do is redirect all emails to addresses such as firstname.lastname@example.org
When I send a test email with this rule in place I'm getting the following error.
The error that the server returned was:
550 5.1.1 <email@example.com>: Recipient address rejected: User unknown in virtual mailbox table