On Thu 09/Mar/2023 19:21:36 +0100 John R Levine via mailop wrote:
Yes, the idea was to prevent malicious unsubs by sending fake spam with
someone else's one-click unsub.
Would a MUA send a POST to a known domain if it was found on a message coming
from an unknown, or anyway different domain?
Maybe. It's quite common for a message to come from some company and the links
to point back to the ESP.
Isn't it difficult to agree on opaque tokens in that case?
Best
Ale
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