Quote:
Originally Posted by frankman  I signed up on some sites and entered a "fake" or "throwaway" email address, (ie. twitter.com@mydomain.com, etc.), but these addresses do not exist in Zimbra and will not be created. The catchall catches and deliver the email to me. From there, I can tell from the "To:" field where the mail came from. |
A catchall address is a spammers dream, you'll always get spam in there.
Quote:
Originally Posted by frankman Is there a way to *list* specific email addresses to reject (at the smtp level so spamassassin isn't involved) and still be able to keep the catchall account? I know this won't solve the spam problem, but it should reduce a significant amount of spam. |
You would be far better having the throwaway address as an alias of your normal account and you can still check the from and to headers. You can then modify the zmmta.cd option
Code:
smtpd_reject_unlisted_recipient
and change it from no to yes then restart postfix. That change will need to be made after each upgrade.