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SMTP error 452 4.1.0 "requested action aborted: try again later #AUP504"

admin Thursday September 21, 2017

If your SMTP server on Bell is failing to send mail from a web application with an obscure/misleading error like the following, just avoiding a foreign sender address (like @gmail.com) may solve.

Mail delivery failed: returning message to sender wrote:
This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

foo@example.com
host smtp.bellnet.ca [204.101.251.122]
SMTP error from remote mail server after MAIL FROM:<chealer@gmail.com> SIZE=2471:
452 4.1.0 requested action aborted:
try again later #AUP504: retry timeout exceeded

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