exchange

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.
pramod1Asked:
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Andy MInternal Systems ManagerCommented:
Sounds like some anti-spam settings on the recieving system is preventing emails reaching them from your domain.

It's worth checking to ensure your reverse dns and spf records are correct.

If  your records are correct, try to see if their IT department/administrator can check their SMTP logs for the reason why it's refusing emails from your domain.
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Kundan GuptaSystem EngineerCommented:
Hi Pramod,

You need to contact pharmetics.com exchange team to check the receive settings.
Their firewall may be blocking the emails from your domain.

Regards
Kundan
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IvanSystem EngineerCommented:
Hi,

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.

Regards,
Ivan.
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pramod1Author Commented:
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.
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Kundan GuptaSystem EngineerCommented:
Hi Pramod,

Please tell them to allow your domain into their firewall.
:)
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pramod1Author Commented:
what should I check in spf records
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pramod1Author Commented:
I checked spf of my domain in mxtoolbox.com what do I need to look
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