550 relaing denied when you send mail from outside

Posted on 2006-05-18
Last Modified: 2012-06-27
I have Exchange 5.5 on nt 4 I put all needed checkmarks on routing restrictions tab in IMS properties and it work fine
Now some users start work outside of our network using laptops. They connect to internet using any available connection
Users can recieve mail can send mail  to (our email domain) but if they send mail to any different
 domain (like yahoo, hotmail...) they getting error 550 relaying denied
Haw I can let them send mail to any email address?
Question by:borisdv
    LVL 104

    Accepted Solution

    If they are connecting via POP3/SMTP then they will need to authenticate to send email.
    The format for Exchange 5.5 SMTP authentication is (if I remember correctly) domain\username\alias


    Author Comment

    you mean put it in outlook there "my outgoing server(smtp) req identification" put user name domain\username
    LVL 104

    Expert Comment

    Correct. Configure Outgoing authentication, but the authentication username needs to be in the format that I have outlined above. I don't think domain\username works on Exchange 5.5 (but it has been a while so I might be wrong).


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