Hi,

Todd Lyons <[email protected]> (Mo 12 Mai 2014 18:08:32 CEST):
> On Sun, May 11, 2014 at 5:10 AM, Thomas Hommers
> <[email protected]> wrote:
> >
> > Actually that was not what i meant, my question should be: How do i make
> > exim droping an email (NDR) on 5xx error instead of freezing and retry?
> 
> If exim gets a 5xx when trying to send an NDR, then it freezes the
> message and does not retry.  Your problem is that you want your system
> to stop retrying to send NDR when it only gets a 4xx.  The best
> suggestion I have for you is to use exipick in a cronjob and try to
> detect these failures.

I didn't follow that thread from the beginning. 
But if you setup a non existing retry interval for bounces, they're
just tried once and then discarded:

1Wk5qd-000553-4V == [email protected] R=dnslookup T=remote_smtp defer (-44): 
SMTP error from remote mail server after RCPT TO:<[email protected]>: host 
mail.kugelbus.de [213.128.132.49]: 451 Temporary local problem - please try 
later
1Wk5qd-000553-4V ** [email protected]: retry timeout exceeded
1Wk5qd-000553-4V [email protected]: error ignored
1Wk5qd-000553-4V Completed


-----
    begin retry

    *   * senders=:
        ^ here you might put a more specific 4xx condition
    ^ here you might put a more specific destination pattern
-----

    Best regards from Dresden/Germany
    Viele Grüße aus Dresden
    Heiko Schlittermann
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