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my organization is unable to send email to @pharmetics.com. all other external mail are going through.
only this external user is affected. error gives: 550 requested action not taken: mailbox unavailable
do I need to check something in my SPF record.
8/22/2022 - Mon
You need to contact pharmetics.com exchange team to check the receive settings.
Their firewall may be blocking the emails from your domain.
that error means that your server has managed to reach pharmetics server, but it did not find that specific user.
Maybe that user has been deleted/ disabled/ something with it? Can you send to any other user from that pharmetics domain?
Your SPF record does not have anything to do with it.
that user exists and he has active mailbox, in fact email to any user gives same error.
the email to any user in that organization goes through fine from Hotmail or any other personal account
and he says he has been receiving emails from all other external organization.
Experts Exchange is like having an extremely knowledgeable team sitting and waiting for your call. Couldn't do my job half as well as I do without it!
Please tell them to allow your domain into their firewall.
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what should I check in spf records
I checked spf of my domain in mxtoolbox.com what do I need to look
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