553 sorry, that domain isn't allowed to be relayed thru this MTA .

[Himanshu Mahanta]

I am constantly getting the above message whenever I try to send a message
outside my office domain and the mail bounces back.

Example of error message:
_____________________________________________
From: System Administrator
Sent: Monday, January 17, 2005 8:29 PM
To: (e-mail address removed)
Subject: Undeliverable:

Your message did not reach some or all of the intended recipients.

Subject:
Sent: 1/17/2005 8:29 PM

The following recipient(s) could not be reached:

(e-mail address removed) on 1/17/2005 8:29 PM
553 sorry, that domain isn't allowed to be relayed thru this MTA
(#5.7.1)



Can you please help me?

Regards,
Himanshu

 

[neo [mvp outlook]]

Try authenticating to the SMTP server that is handling your hotmail account.

 

[Jeff Stephenson [MSFT]]

Try authenticating to the SMTP server that is handling your hotmail account.

Actually, the sender's account is not Hotmail - that's the domain that the
outgoing server won't relay to. Just authenticate to whatever outgoing
server is giving this error.