Typical scenario is message is forwarded by recognized but DMARC-unaware forwarder. There are still many large mailbox providers and even more enterprise mail system where DMARC is not implemented.
Probably, you did everything you can, so just accept some messages are not DMARC-blocked, because DMARC is not implemented by all recipients, and it also affects inderect mail flows, even if final destination implements DMARC. 10.10.2017 22:14, Pete H via dmarc-discuss пишет: > Hi all, > > New to this list, not to the 'net (I registered octopus.com -- that > will tell you more about me than anything ;) ) > > I have an interesting situation. > > Our context combines: > - A very old domain name that we ONLY use for infrastructure. No web > site, no email. (ds.org) > - Other domains operate on top of that infrastructure. We do have a > reasonably active email server. > - (In reality we're a tiny nonprofit...) > > Our email server was being spoofed /so /much, I finally bit the bullet > and fully implemented SPF/DKIM/DMARC over the last few weeks. > > Since 100% of all ds.org email is fake (other than when I generate a > test message)... it's pretty easy to recognize loopholes and failures > in the overall DMARC system. > > I've got most emails under control with a 100% reject policy. However, > several items are NOT being rejected. Looks like Google and possibly > some others are being faked out... and I don't know how to fix it. > > *Out of ~1200 bad emails in the last week, 34 messages were > Quarantined by Google rather than rejecting, because it thought they > were forwarded.* > > Another set of reports (from mail.ru) show messages being rejected as > requested. > > Is there anything I can do to fix this? > > Thanks, > Pete > > > > _______________________________________________ > dmarc-discuss mailing list > dmarc-discuss@dmarc.org > http://www.dmarc.org/mailman/listinfo/dmarc-discuss > > NOTE: Participating in this list means you agree to the DMARC Note Well terms > (http://www.dmarc.org/note_well.html) -- Vladimir Dubrovin @Mail.Ru
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