Hi, This is sorta a feature request. A lot of people use dmarc to check for incoming mails. Is there a way to turn off dmarc checking in the smtpd? This would be valuable for trusted sources such as mailing lists.
Let me give you an example. I mail 1000 bytes to openbsd-misc and there is thousands of recipients on that mailing list. When their software delivers to these thousands I get a DNS request (I'm predicting 40 bytes in the question, and no less than 40 bytes in the answer * thousands) that's already a minimum of 80K bytes DNS traffic generated by a 1K byte mail. It would be cool if OpenBSD could set a "X-DMARC-VERIFIED" header or something and based on a policy on every smtpd that receives this no dmarc dns request is caused. This would make me very happy. Is this all technically possible? Best Regards, -peter
