sorry, that address cannot accept mail from an unresolved IP address

Posted on 2011-04-20
Last Modified: 2013-11-30
I am trying to send email from a MS Exchange Server to a Netfirms domain but I get this error: rejected your message to the following e-mail addresses:
Mario Lopez ( gave this error:
sorry, that address cannot accept mail from an unresolved IP address
A problem occurred during the delivery of this message to this e-mail address. Try sending this message again. If the problem continues, please contact your helpdesk.
Question by:madios63
    1 Comment
    LVL 6

    Accepted Solution

    you need to have a reverse lookup on your mail server.

    Some servers block all message that do not have a reverse address.

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