(Answer) (Category) Accessing Services at OA5 / YASK / Irial : (Category) My Email : (Answer) 550 5.7.1 my.dom does not send mail through x.y.z.n, please discard What does this mean?

When you get error messages containing something like:

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:

me@my.dom.ain
SMTP error from remote mailer after end of data:
host mail.xyz.com [1.2.3.4]: 550 5.7.1 my.dom.ain does not send
mail through 5.6.7.8, please discard

There are two possible explanations

  1. Someone (probably a virus) is using your e-mail address to send mail / virii / SPAM / Phishing as though you had sent it (not something one wants at all) or
  2. You did sent the mail yourself, but not from anywhere we had configured for anti-spoofing. Please see (Xref) How do I configure my E-Mail program to access my mail? about connecting to our servers on port 587, to send mail -- you can do this from anywhere you have a connexion, even if the ISP blocks access to port 25 (the normal mail-send port)

[Append to This Answer]
supportAToa5DOTcom
2009-Nov-03 15:16
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