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MS Exchange 2007 Receiving Error 550 5.4.4 ROUTING.NoNextHop; unable to route from one user

Posted on 2008-06-13
Medium Priority
Last Modified: 2011-09-20
We have client that is running MS Exchange 2007. There are other users that can e-mail to usernamehere@mabeg.net. However when one user e-mails to this address he receives the following error:

Diagnostic information for administrators:

Generating server: server.domain.LOCAL

#550 5.4.4 ROUTING.NoNextHop; unable to route ##
All users are using MS Outlook to access their Exchange mailbox to send the e-mails. Any help or direction to look would be greatly appreciated.

Thanks in advance.

Question by:jenkinsme
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Expert Comment

ID: 21779391
Is this particular user using the auto-completed entry in Outlook? i.e. are they typig us...and the email address is selected automatically for them?

Does the user have their default SMTP address set correctly? domain.local will not resolve externally.


Author Comment

ID: 21779683
The user is getting the address from their Outlook Address book and inserting it into the e-mail that way.  The SMTP server is setup in MS Exchange not the local client.

Accepted Solution

Dovinshka earned 1500 total points
ID: 21779799
" The SMTP server is setup in MS Exchange not the local client. "

In Exchange, a user can have multiple email accounts. The default account is highlighted and the word SMTP is in capital letters. Check to see what email address is set as the default.

Try sending an email by directly typing the email address and not using the outlook contact.

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Author Closing Comment

ID: 31466940
Thank you for pointing me in the right direction. The user was able to e-mail to that address by typing in the e-mail address which means that somewhere in his contact list he has incorrectly entered the users e-mail address.
Thank You for your quick response and help.

Expert Comment

ID: 21780048
Glad to have helped :)

Expert Comment

ID: 34771452
Helped me too, dud cache was the issue.

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