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Verify the existence of email senders

Discussion in 'E-mail Discussion' started by GoWilkes, Sep 13, 2007.

  1. GoWilkes

    GoWilkes Well-Known Member

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    Until recently, under the Standard Options of the Exim Configuration Editor I had checked "Verify the existence of email senders" and "Use callouts to verify the existence of email senders." But sometime around August 15, one of my clients reported that emails from a local ISP (Embarq, a subsidiary of Sprint) were bouncing with the following error:

    451 Could not complete sender verify callout

    After discovering that unchecking "Use callouts" didn't resolve the problem, my server manager (The Planet) recommended that I uncheck "Verify the existence of email senders" altogether. Doing so did resolve the problem, so, the client is happy.

    But I'm not! Now, my mail queue is getting PACKED with spam! To the tune of about 12,000 emails a day. Before this change, it had more like 50 a day. I'm having to clean it out several times a day, otherwise emails start being delayed.

    Is this a common problem? If so, surely there's a better resolution than this. I can't go through life cleaning the mail queue manually every 4 hours; a man has to sleep sometime!

    TIA,

    Jason
     
  2. AndyReed

    AndyReed Well-Known Member
    PartnerNOC

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    One of these threads should help: http://forums.cpanel.net/showthread.php?t=69210
    http://forums.cpanel.net/showthread.php?t=61971
     
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