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sudden email error on one domain

Discussion in 'E-mail Discussion' started by Secret Agent, Apr 2, 2005.

  1. Secret Agent

    Secret Agent Guest

    I'm suddenly getting this error in Outlook for my domain that has bene working fine all along.

    Task User - Sending' reported error (0x800CCC78) : 'Unable to send the message. Please verify the e-mail address in your account properties. The server responded: 550 5.1.8 invalid/host-not-in-DNS return address not allowed'

    The site is fine, I receive fine but smtp seems to be the trouble suddenly. I am not sure why. Anyone have an idea about this?

    The site is up, dns is fine too.

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