[MM3-users] Re: Help understanding why some users don't receive emails

Mark Sapiro writes:

On 9/21/22 14:06, Stephen Daniel wrote:

...

Looking at one user in particular, I see in /var/log/syslog that postfix is sending the email. There is nothing in bounce.log.

<https://en.wikipedia.org/wiki/Forward-confirmed_reverse_DNS>. It can also possibly help for the server's domain to publish a DMARC policy even if that is p=none

The embarqmail.com domain publishes p=reject. This doesn't affect mail going *to* that domain, but it suggests they're aggressive about "fighting spam". It might help if the mailing list host were to participate in the ARC protocol.

Steve