On 01.12.22 15:23, David Dolan wrote:
>We have two customers who we're unable to receive email from.
>It's failing the helo lookup as it can't resolve the hostname in the helo
>message.
>Helo command rejected: Host not found;
On Thu, 1 Dec 2022 at 15:49, Matus UHLAR - fantomas <uh...@fantomas.sk>
wrote:
The issued hostname is logged just prior to this text.
You skipped the most impotant info here.
On 01.12.22 16:06, David Dolan wrote:
NOQUEUE: reject: RCPT from unknown[103.246.251.109]: 450 4.7.1 <
wx-use2.prod.hydra.sophos.com>: Helo command rejected: Host not found;
from=<#############> to=<#############> proto=ESMTP helo=<
wx-use2.prod.hydra.sophos.com>
strange, wx-use2.prod.hydra.sophos.com is resolvable from here, although it
has 33 records.
Don't you run private DNS containing domain sophos.com or
any its subdomains?
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
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