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nourben
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Email sent rejected #550 5.7.1

I have user trying to send emails to
Delivery has failed to these recipients or distribution lists:

aaa.bbb@sbcglobal.net
Your message wasn't delivered because of security policies. Microsoft
Exchange will not try to redeliver this message for you. Please provide the
following diagnostic text to your system administrator.

The following organization rejected your message: flph259.prodigy.net.

________________________________

Sent by Microsoft Exchange Server 2007







Diagnostic information for administrators:

Generating server: our transport server

aaa.bbb@sbcglobal.net
flph259.prodigy.net #550 5.7.1 Connections not accepted from servers without
a valid sender domain.flph259 Fix reverse DNS for x.x.x.x ##
Exchange

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Last Comment
Alan Hardisty

8/22/2022 - Mon
ASKER CERTIFIED SOLUTION
LLMorrisson

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SOLUTION
Alan Hardisty

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LLMorrisson

Apologies I misread the error and see now that flph259.prodigy.net is not in fact your server but one of the remote MXs. Basic premise is still appropriate though, and Alan's article covers it off nicely.

Thanks,
LLMorrisson.
Alan Hardisty

So 2 months after you couldn't be bothered to reply to the participating Experts you close it down with "This was resolved and by Network Engineers" and then you are able to ask new questions.

Objecting to arbitrary closure.
Alan Hardisty

50/50 Split between http:#a35095538 and http:#a35095572 should solve this problem happily.

Alan
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