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E-mail issue RCP host

aando asked
Last Modified: 2012-05-09

Today I had a exchange server all the sudden that stopped sending and receiving e-mail and nothing has changed on it. When I attempt to send e-mails to it I am getting the following NDR message:

    SMTP error from remote mail server after RCPT TO:<staff@ldomain>:
    host mail.domain.com [IP Address]:
    553 sorry, that domain isn't in my list of allowed rcpthosts; no valid cert for gatewaying (#5.7.1)

I have checked the server to be on a blacklist and it appears not to be on a black list. I have also rebooted the server and verified that DNS is working correctly also ran a virus scan on the system and nothing was found. Any suggestions?
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