On 8/21/2014 3:43 AM, Tony White wrote:
Hi folks,
Has anyone any idea why qmt has stopped reporting delivery failures
please?
I sent an email this afternoon and watch the log for send. The email
delivery
attempt was made with a 451 error but nothing resulted in my mailbox.
Tony:
Error numbers in the 400's usually mean "retry later"
Error numbers in the 500's usually mean "it's dead, Jim"
Typically, there is no message generated when a 4xx return is
encountered, as the message is simply re-queued and tried again later.
(Unless/until the message times out).
I ran into a really nasty problem with this in an Exchange server,
because the messages to a journalling host (think TAP) were failing due
to SPAM control, but the errors (because it was a journalling rule) were
always re-written to a 4xx message -- the result being the send queue
getting EXTREMELY full!
I hope this helps.
Dan McAllister
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