Huge mailing list with dadamail & bounces

LawsHosting

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Joined
Sep 13, 2008
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London UK
I have this client using a HUGE mailing list with Dadamail. Well the software has a bounce manager.

I've noticed that bounced messages have a blank sender, therefore the "limit_unknown' (set at 1k) gets hit, and exim freezes the bounces as the limit is reached, and therefore the Dada's bounce manager fails.

I didn't think bounces had a blank sender?

Here is a snip of my queue:
J3iuK8l.png


NB. The Return-Path, SPF and DKIM are set correctly.

Can someone suggest what is going on, if not I will need to ask this client to move away.
 
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