CiviCRM Community Forums (archive)

I see these bounce types in a CiviMail report -- "invalid" and "unknown".  Is there any difference?

If you’ll look into the civicrm_mailing_bounce_type table, you’ll see that the ‘invalid’ bounce type means the email address is not valid. ‘Unknown’ are the bounces that weren’t matched to any rule provided in civicrm_mailing_bounce_pattern (do feel free to add your own rules or, better yet, send them our way so we can include them in the future).

Similarly is there any intelligence to be gained from "bounce reason" other than that different servers produce slightly different messages on a bounce?

When I look at the contents of civicrm_mailing_bounce_type, the different types indicated there make sense to me; it’s one thing then an address is invalid, another when the recipient’s inbox is full (so he’ll be able to get email later), and yet another when there’s a routing error (so he can’t even guess he’s not getting anything).