Office 365 - Reverse DNS
Question asked by Gary Pacitti - April 5 at 4:42 PM
Unanswered
We recently had clients complain that their customers email was not being received. The senders were using office 365 as a provider.
 
We tracked this to a Reverse DNS failure, which was correctly identified by SmarterMail and therefore given a high SPAM score as we have always had this set to a relatively high number in SPAM settings.
 
It would seem Microsoft acknowledge this as an issue and state Sending MTA  does not require a matching PTR record according to RFC’s ?
 
 
Most information out there would suggest to the contrary and wondering if setting a high SPAM score to reverse DNS is still appropriate/recommended.
 
Be interested to hear others thoughts and opinions?
 
 

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