On 12/14/2017 09:27 AM, Ryan Prihoda wrote:
> 
> What about SPF, DMARC, DKIM ? I am sending 250k/day and only Earthlink
> seems to care.

Out of the box, SpamAssassin will penalize you too:

https://wiki.apache.org/spamassassin/Rules/RDNS_NONE

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