MySQL Student:
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> Hi,
>
> > Ah, found it. ?The problem is you've got the Postfix host relaying mail
> > to itself. ?It's right in your log entries:
> >
> > to=<[email protected]>, relay=127.0.0.1[127.0.0.1]
>
> Yes, my apologies; as Sahil said, I'm using amavisd-new, although there is
> no longer spam and virus scanning happening on this host.
>
> The message is just getting requeued back to the second queue.
Have you already looked at a tcpdump recording as requested?
Wietse