user cannot sent external mail

Posted on 2007-10-09
Last Modified: 2010-03-06
i have SBS2003 Premium domain, most users only need 1 reply address ( that works ok)  2 users have 2 seperate user accounts and each account needs a different reply to address than that of the rest of the domain.
The problem is that when i set the new reply to address and set it as default the user cannot send external mail.

the users get the following error in outlook:

There was a SMTP communication problem with the recipients email server.Please contact your administrator.
< #5.5.0 smtp;550<>...not permitted.
Question by:elliottbreen
    LVL 104

    Expert Comment

    That is not an Exchange message.
    Do you send email through your ISPs server? If so, do they need to be told about the second domain to allow it to relay through their servers?


    If your question has been answered, pleased remember to accept the answer and close the question.

    Author Comment

    I have been told that this was working fine and in the last couple of weeks stopped working. thus i did not think the ISP was the issue

    Is there anything that i can check locally to confirm that the exchange server is configured correctly?

    LVL 104

    Accepted Solution

    Previous working operation is not an indication that it was working correctly or would continue to work in the future. ISPs will change things when they like, often without notifying their customers that they have changed something. Therefore you cannot rule out the ISP as having the issue.
    However it does depend on how you route your email. If you do route email through the ISPs server then you have to ask them what is happening. Does the error occur when ANY email is sent? It doesn't matter who the recipient is?
    That isn't an Exchange message so it is happening outside of the Exchange server.


    If your question has been answered, pleased remember to accept the answer and close the question.

    Author Comment

    thank sorted now

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