Re: Nightmare? was unsubscribe

Hi,

On Tue, Nov 21, 2017 at 12:44:48PM -0600, Igor Korot wrote:
> Why people who performed the change couldn't create a mail template
> where the "Subscribe/Unsubscribe"
> links would be visible at the bottom of the e-mail?

That would change the body of the mail. Mail that is DKIM signed (or
worse conforms to DMARC) cannot be so changed, or it will fail
validation and will be bounced. The bouncing system is then doing the
correct thing, and yet it will create "excessive bounces" to the list,
which will cause the _validating_ user to become a problem on the
list. Users don't control their mail server validation policies, so
lists have to conform. Tom Lane explained this upthread somewhere.

If you think this is all the consequence of having something like <20
(or <5, depending on how you count) important email services in the
universe, plus "everybody else", you're right.

A

--
Andrew Sullivan
ajs(at)crankycanuck(dot)ca