Returned mail

[Guest]

I have a user that get this message when replying to ony one person.

"The e-mail account does not exist at the organization this message was sent
to. Check the e-mail address, or contact the recipient directly to find out
the correct address.
<server.domain.com #5.1.1 smtp;550 5.1.1 User unknown>"

The user that is receive the message does exist and can be seen in the
address book.
Any ideas?
Thanks

 

[Guest]

Is the email address in the user's contacts correct? Is this person being
chosen from a GAL or the user's contacts? I would suggest making sure the
email address is entered correctly.

 

[Guest]

The user get the message when clicking on "reply" when the person write an
email. also if a seperate message is sent to the person using the GAL.
I can send an email message to the person with no problems.

 

[Guest]

Is this person using cached Exchange mode? If so, download a new GAL for
them. See if that helps.