[exim-dev] [Bug 1788] Some deliveries not re-attempted after…

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Autor: admin
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A: exim-dev
Assumptes vells: [exim-dev] [Bug 1788] New: Deliveries to one ISP sometimes fail silently after T=remote_smtp defer on first delivery attempt
Assumpte: [exim-dev] [Bug 1788] Some deliveries not re-attempted after 'T=remote_smtp defer (-53): retry time not reached for any host' on first delivery attempt
https://bugs.exim.org/show_bug.cgi?id=1788

--- Comment #12 from Alex Presland <exim@???> ---
Monitoring now in place. All I need to do is get the user who uses the
user@??? to route their email back to that email address
again (haven't seen the bug since 2016-02-08, after which they got fed up of
losing emails and routed their email elsewhere).

I think that the regular "421 ... Too many connections from same IP" response
from Plus.net's mail servers is helping to expose this problem, by causing
subsequent messages to be deferred. I've not done anything about this so far
but once I've finished collecting data for this bug report, I'm going to use
the serialize_hosts setting for plus.net MX servers to prevent this from
occurring.

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