Re: Amavis and OpenDMARC
Damian <[email protected]> Sun, 12 Nov 2023 09:50:32 +0100
| Newsgroups | gmane.mail.virus.amavis.user |
|---|---|
| Message-ID | <[email protected]> |
>>> if policy uses fo=0 then yes, both SPF and DKIM must exist, and both must pass. >>> >>> if policy uses fo=1 then no, as a minimum /either/ SPF or DKIM must exist, and pass, so DMARC will work with only SPF or only >>> DKIM, it will also work with both, which has the advantage that only one of these must pass, eg: SPF passes but DKIM fails, >>> DMARC usinng fo=1 will pass. >>> >>> I recommend fo=1 for general use but fo=0 for critical areas, like govts, legal and finance sectors, or those who deal with >>> them on a very regular basis, in which case they wouldn't be authorised to use there govt/corp email for private use so if >>> ill-configured mailing lists for example rejected them, then that's acceptable collateral damage. >>> >> [...] >> My understanding of the "fo" option is that it is only used for reporting. i.e. It doesn't control whether the received email is >> accepted or not, which is always based on /either/ SPF or DKIM checks passing. >> [...] > Ahhh you're right, my very bad, I was confusing r/s ... Would the above finetuning of (DKIM || SPF) vs. (DKIM && SPF) have been achieved in some early draft version? I cannot place "r/s" in any other context than relaxed vs. strict alignment.