Bouncing email using Microsoft Exchange 2003 RRS feed

  • Question

  • We are using ME 2003, which is situation in the "cloud", with Panda (Cloud) security.  The server is blocking emails and only some are getting through.

    We host our own email then route through a thirdparty for anti spam.   I can't get to the bottom of the issue with the IT company.

    The message a sender gets when email bounces back is:\

    The recipient was rejected by a remote mail server.

    Reason: 5.7.1 Service unavailable; Client host [] blocked using dnsbl.sorbs.net; currently sending smap see: http://www.sorbs.net/lookup.shtml?


    Wednesday, March 30, 2011 1:29 AM