Robert Breithuber schrieb:

> i have lots of entries in ..mailman/logs/smtp-failure like this:
>
> Jan 27 22:26:39 2004 (29932) delivery to [EMAIL PROTECTED] failed with code 
> 450: <[EMAIL PROTECTED]>: Recipient address rejected: Domain not found

Makes sense:
| [EMAIL PROTECTED] thomas]$ host sushu.net
| Host sushu.net not found: 2(SERVFAIL)
| [EMAIL PROTECTED] 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


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