Robert Breithuber schrieb:
i have lots of entries in ..mailman/logs/smtp-failure like this:
Jan 27 22:26:39 2004 (29932) delivery to public@sushu.net failed with code 450: <public@sushu.net>: Recipient address rejected: Domain not found
Makes sense: | [thomas@xerxes thomas]$ host sushu.net | Host sushu.net not found: 2(SERVFAIL) | [thomas@xerxes thomas]$ host -t mx sushu.net | Host sushu.net not found: 2(SERVFAIL)
Seems the DNS-service for sushu.net is down and does not reply to queries.
since weeks now every 15min (!)
Yes. "450" is a *temporary* failure, so Mailman or your MTA will try again to deliver the mail. It will do it every x minutes or hours (as it was configured), and it will try it x days long (as it was configured) before bouncing the mail as undeliverable.
any ideas what may go wrong? is this not a case for bounce processing?
No, not yet. If a mail can temporarily not be delivered, delivery is tried again and again (normally the retry time is becoming longer after each failure) until a time limit of about four days is reached. The mail is finally bounced then.
Perhaps sushu.net will be able to fix it DNS before the timeout - then all mail will be delivered there, and the owner will be quite thankful that his mail is not lost and bounced.
-thh