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  • "Error 550 550 Address generates Mail loop (state 14) Possible "Greylisting"????

    Our domain and email server can send and receive emails from only within our domain. We can send emails to external email services successfully. We can in instances receive emails sent back to our domain by way of reply from external internet email services. In pretty much every instance, when someone from outside our domain ...
    Posted to Ask MXToolbox (Forum) by Anonymous on June 24, 2008
  • Re: Your links for Casa-Cbl doesn't work

    Anonymous:Your links for Casa-Cbl+, Casa-Cbl, and Casa-Cbl- don't work.  How do I get us removed from their blacklist?Update: As of Feb, 5th 2009 the MxToolBox Forums have moved to http://community.mxtoolbox.com/forums
    Posted to General Feedback (Forum) by Anonymous on September 12, 2007
  • Re: Greylisting Causing Problems?

    Yes, Greylisting does cause a problem. Our Monitoring servers ''SMTP Ping'' thousands of customer mail servers everyday. As a result, the monitoring server gets Greylisted. To use the service, you will need to whitelist the following CIDR ranges: 64.20.227.128/28 208.123.79.32/27   Thank You, MXTB Team  PS: Do you have other ...
    Posted to General Feedback (Forum) by Joel on June 8, 2007