On Fri, 2020-10-16 at 15:32 +0100, Kevin McCarthy wrote: > Anyone else been unsubscribed from this mailing list? > I just got a "You have been unsubscribed" email from > > [email protected] > > even though I didn't post any messages. > I'm with VirginMedia and I haven't personally changed anything. > > Had a confirmation from the mailing list after resubscribing so I guess it's > ok now.
Probably a combination of mailer misconfigurations. What often happens is that someone's mail admin buys in to one of these still spam-avoidance snake oil schemes, and publishes a record promising to the world that, e.g. "mail From:[email protected] will never come from anywhere except my own mail server, directly". That's misconfiguration #1. Someone @example.com then sends a message to a mailing list, which does the correct thing of sending it on with the From: header intact, since that indicates the author of the message — and with a Sender: header indicating that it was actually the list software that sent this copy of the message. A second mail misconfiguration is needed at the final recipient's end, where they look at the message, look at the misguided promise from the original sender's email domain, and decide to reject the message as "spam". If a recipient bounces too many list messages, they get removed from the list as a non-functioning address. I suspect that's what just happened to you.
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