I am running a Zimbra virtual machine on Ubuntu 14.04.4 LTS.

I am getting a few emails returned to me with this message:

<[email protected]>: host
    mxia.craigslist.org[] refused to talk to me: 554
    coldmail.co.xx.xx.xx.in-addr.arpa [xx.xx.xx.xx] Please setup matching DNS
    and rDNS records: http://www.craigslist.org/about/help/rdns_failure

I run this on a virtual machine running on a dedicated server that I rent. My host assures me that the rdns record is setup correctly to my domain.

When I check on http://mxtoolbox.com/ they are returning this to me:

enter image description here

Is this something I need to correct on my virtual machine setup or is it something I need to get my host to correct?


1 Answer 1


You'll have to contact support at your host to have this resolved.

Some hosts - godaddy in particular, even with their so called dedicated servers (don't get me started) - funnel all mail out through their own mail server so rDNS resolves to their server not yours. The only way I was ever able to resolve this was to move to a new hosting company.

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