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smtp communication

i created a new account for a user that got married and then put a forwarding rule from their old account to the new one.
but they cant send mail to external receipients and get the following ms:

 There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
  <MAILSERVER NAME #5.5.0 smtp;553 Requested action not taken: mailbox name not allowed>

any ideas
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LBC
Asked:
LBC
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1 Solution
 
Chris MillardCommented:
It might just have been easier to rename the user in Exchange or Active Directory and add the new SMTP email address to her account rather than create a new user.
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fred9777Commented:
Make sure you don't have a special character in the mailbox's name
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Stelian StanCommented:
I would rename her old account and add a SMTP address like OldUserName@domain.com .
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btetlow-expertCommented:
I would have renamed the user, then create a NEW SMTP address reflecting the new name, LEAVING the old one --- not everyone who has that person's old address will have the new one right away ---  just make the new one as the primary --- then whoever she mails to will always get the new address....

Forwarding creates a monster on its own --- you have to maintain a document that logs that forwarding in case someone comes after you and needs to know that information....   rename removes that need.
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Simon Butler (Sembee)ConsultantCommented:
That doesn't look like it is an Exchange error. Do you send email via a smart host? It could be that which is rejecting the email.

I have to disagree about the comments above on renaming/forwarding. Renaming an account causes a lot more problems than forwarding. If you rename an account you will break a lot of things, specifically old email, calendars etc. The business impact can be considerable. If you have a large site, then simply disable the old account, put a note in the comments and move the old account to its own OU. No need to maintain anything external.

Simon.
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LBCAuthor Commented:
I renamed the account but it displays the old user name at the header of the mail and it will not display the new address.

I have checked the settings - but can see were to change this ?
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Simon Butler (Sembee)ConsultantCommented:
That information comes from the domain. If you have changed everything in the domain correctly then it should be showing on the emails correctly. Otherwise it could be a sign of poor replication between the domain controllers.

Simon.
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Stelian StanCommented:
Do you mean in outlook? If is that the case just remove the outlook profile and create a new one.
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LBCAuthor Commented:
i changed the name just in the active directory of the old person to new name and it is coming through as old address - i dont understnad why everything hasnt chnaged!
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fred9777Commented:
Can you give us details on which version of Exchange you're using, Windows server version, how many DCs, etc.
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LBCAuthor Commented:
thanks for your advice I was able to resolve this query.
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