Mail Returned as Undeliverable -- #5.5.0 smtp;550  recipient rejected

Posted on 2006-04-05
Last Modified: 2012-06-21
I have Exchange 2003 and Outlook 2003 as the mail client -- one of my users sent out an e-mail and it was returned as undeliverable with the following message:

There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.< #5.5.0 smtp;550  recipient rejected

I'm not sure why this was returned - any help would be appreciated.  Thank you.
Question by:mmj1
    LVL 8

    Assisted Solution

    please confirm the correct address of the recepient
    LVL 104

    Accepted Solution

    The message means what it says.

    The server that the message was sent to rejected the recipient. This could be a bad address, bad configuration etc.

    My instinct says that there may be some kind of restriction on that recipient, if the address was wrong, then I would expect "User Unknown" type message to come back.

    Almost certainly not a problem at your end, the sender needs to contact the recipient and see what the problem is there.


    Author Comment

    Thanks for the assistance.  I was hoping it was not a problem with my server and I think you agree.  We are checking into the accuracy of the e-mail address the user is sending to but are pretty certain it is correct.

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