Am 27.04.2022 um 14:48 schrieb Dave Crocker via mailop:
On 4/26/2022 5:48 PM, Dan Mahoney via mailop wrote:
The pedantic* answer here might be to make postfix smart enough to
not apply this logic*if* there's a DKIM signature with simple/simple
in the canonicalization.
It is always tempting to react to a specific anomaly by adding a 'fix'
specific to it. Unfortunately, over time, this tends to produce a
rat's nest of idiosynchratic behaviors.
Where possible, it's better to take the case of the anomaly as a prod
to consider whatever larger issue it is part of, and make any changes
-- if needed -- from that larger perspective.
I think the thread did a reasonable job of this, by noting that
relaying is the wrong place to enforce this kind of violation.
Exactly. The best and easiest solution is to contact the sender and tell
them to fix the problem, by either using "relaxed/relaxed" or by
reducing the line length to <=998 bytes.
This solves the problem for all receivers worldwide, not just for your
system.
Michael
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