Microsoft 365 and Office | Other
Miscellaneous topics that do not fit into specific categories.
That is definitely a configuration issue with their email server. They need to fix it.
Not able to send emails -
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Dyocs-5338
0
Reputation points
I'm getting an error message and i'm not able to send an email to specific addresses
Error message:
Sender not authorized for relay
Status code: 550 5.7.368
Microsoft 365 and Office | Other
2 answers
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Diane P 8,075 Reputation points Independent Advisor2026-02-25T15:31:48.0233333+00:00 That indicates a misconfiguration of the mail server - usually the recipients server. You server tries to contact their server and is refused.
You say it only happens when you email specific addresses - are they all in the same domain?
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Dyocs-5338 0 Reputation points
2026-02-26T06:09:32.1266667+00:00 it only happens on a specific domain (tempgirl.com)
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