Setting up Reverse DNS for Smartermail?
Question asked by Francis Gibbons - May 22, 2017 at 1:44 PM
Hello All,
I'm running Smartermail 15.5 on a Windows 2012 system. I have multiple domains running email off my server using IP x.x.x.19. However, my one domain gets a rDNS rejected email from time to time saying:
Reason: Failed to connect to the recipients mail server.  No DNS information
was found for the '' domain.
Status: 544 5.4.4 Host not found (not in DNS).
But if you do a rDNS lookup it comes back to which is my hosting company and not which is my customer. However my IP hosting company only allows me to setup rDNS for 1 domain so I can't add along with all other domains sending mail out of x.x.x.19. So with that said how should I setup smartermail to handle reverse DNS for this IP so all mail will be valid with rdns?
Frank G.

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echoDreamz Replied
Over the years with SM, we have had some strange results with rDNS lookups. IE failures when there was no reason to fail, passes when there should not have been.

My biggest issue is it seems that SmarterMail does not also perform forward confirmations.


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