List-Unsubscribe: <https://www.example.com/unsub/{token}>
List-Unsubscribe-Post: List-Unsubscribe=One-Click
I don't know which fools to blame; The client Costco, or their ESP
WhatCounts. Perhaps both.
Definitely both.
I don't work for or with WhatCounts, but I know who does, so I nudged them.
Considering that every message sent without working unsubscribe is a CAN
SPAM violation, I'd think some tooling to check that the link at least
connects to a server would be in order.
Regards,
John Levine, jo...@taugh.com, Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly
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