On 25/01/2018 21:46, Carl Byington wrote:
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On Wed, 2018-01-24 at 09:30 -0500, Al Iverson wrote:
Smells like a Fasthosts misconfiguration from here.
If they are doing ip queries against the DBL for all connections, they
will be refusing all incoming email. One might think that would be
quickly noticed and corrected. Perhaps they only do those queries for
some subset of the inbound mail.
We haven't had any more instances of this happening since Monday. We
also had had other (good) mail that had worked before suddenly being
blocked due to other DNSBLs. So, my suspicion is that over the weekend
someone decided to 'improve' their spam filter and went a bit too far,
and then at least some of those 'improvements' were rolled back on Monday.
(Our server doesn't use an IP address literal in EHLO, so I don't think
it's that).
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