Thanks for the message. The anonymizing is not a problem. It turns out that this is almost an RFC 3464 compliant DSN and should be recognized by Mailman/Bouncers/DSN.py except for the fact that the 'action' in the Delivery Report is 'error'. This is non-compliant. RFC 3464, sec 2.3.3 defines action as: action-value = "failed" / "delayed" / "delivered" / "relayed" / "expanded" Thus, 'Action: error' in this DSN is non-compliant. It should be 'Action: failed'. You may wish to report this to the opensmtpd developers. If the mean time, if you look at Mailman/Bouncers/DSN.py at line 59, you'll see if not action.startswith('fail'): # Some non-permanent failure, so ignore this block continue If you change that to if not (action.startswith('fail') or action.startswith('error')): # Some non-permanent failure, so ignore this block continue this DSN should be recognized by DSN.py. I'll be incorporating this fix for the next release. -- You received this bug notification because you are a member of Mailman Coders, which is subscribed to GNU Mailman. https://bugs.launchpad.net/bugs/1805137 Title: Bounces sent from opensmtpd not parsed To manage notifications about this bug go to: https://bugs.launchpad.net/mailman/+bug/1805137/+subscriptions