On 6/15/2019 6:13 PM, Steve Atkins wrote:
On Jun 15, 2019, at 9:25 PM, <dilyan.palau...@aegee.org> wrote:
Hello,
p=reject; pct=0 is equivalent to p=quarantine; pct=0.
I've not been following this thread too closely so I might
be missing something, but under current DMARC spec I don't
think that's so - see section 6.6.4.
If I've missed the point ... never mind, carry on.
If I follow myself, I think it could be expressed as:
p=reject; pct=0; is effectively equivalent to p=quarantine; pct=100;
Given the order of mail "restriction" or "filtering" from high to low
of reaching the user's eyeballs:
p=reject never accepted or accepted/discarded
p=quarantine accepted, imported into spam box, outside inbox
p=none accepted, imported into inbox
The "pct" effectively forces a fallback to the next lower applicable
policy once the pct of failed mail has been processed:
p=reject; pct=X; fallback to p=quarantine
p=quarantine; pct=X; fallback to p=none
p=none; pct=X fallback to UNDEFINED, N/A
where X can be 0 to 100.
When pct=100, which is the default, then the fallback would not apply
since the explicit domain policy is applied to all DMARC failed
messages. The receiver rejects mail with p=reject and quarantines mail
with p=quarantine.
If there is an explicit pct=0, then effectively, the fallback is to be
applied immediately, thus:
p=reject; pct=0; is effectively equivalent to p=quarantine; pct=100;
and
p=quarantine; pct=0; is effectively equivalent to p=none; pct=100;
Because of the fallback and quarantine implementation complexity and
how failed messages can reach users, the OP is proposing to abolish
the quarantine policy.
--
HLS
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