Error 554 5.7.1 Relay Access Denied Microsoft Outlook

C

Crashedata

Server settings have not changed on the computer recieving this error, and I
have verified nothing has changed on the Server its self. What could be
causing this error when trying to send an email?
 
I

IJA

This is my error:

This Message was undeliverable due to the following reason:

Each of the following recipients was rejected by a remote mail server.
The reasons given by the server are included to help you determine why each
recipient was rejected.

Recipient: <[email protected]>
Reason: 5.7.1 <[email protected]>: Sender address rejected:
sender address is forged


Please reply to Postmaster@<PostmasterDomain> if you feel this message to be
in error.
I can send email to the same domain but not this one
(e-mail address removed)
 

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