[qmailtoaster] QMail seems to have stopped reporting delivery failures.

2014-08-21 Thread Tony White

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.

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best wishes
  Tony White


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Re: [qmailtoaster] QMail seems to have stopped reporting delivery failures.

2014-08-21 Thread Dan McAllister

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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St. Petersburg, FL 33701-3806

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