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:<46e6820d4d3532509d8603ba1546406a@reply.craigslist.org>: host    mxia.craigslist.org[208.82.237.85] refused to talk to me: 554    [1F14D9E7-73BD-489F-AC79-4E640DB27254@mxi6a]    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_failureI 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:Is this something I need to correct on my virtual machine setup or is it something I need to get my host to correct?
Mail server rdns setup not right
email;dns