On 03/11/2023 10:22, Steffen Nurpmeso via Postfix-users wrote:
- SPF breaks all hosts which have users that effectively want their email to be forwarded to a different address. This is basically any campus, and much, much more.
FUD... why do people rely on 15+ years old problems to back their argument.
If correctly forwarded it does not break SPF, since correctly forwarding rewrites the sender, I was an early adopter of SPF and always used hard-fail, no lists have rejected my posts from SPF (trust me, if they did, I sure as hell still wouldn't be using -all), I have also applied the same in $dayjob over all these years, so I'd be the first to know if it was still a problem.
DKIM, was a problem, but for several years now mailman can do the right thing by stripping out the original DKIM headers and rewrites sender (although you need to know where to add the former) - but only if the admins set those settings (its more a mailman problem for not enabling them by default)
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