locked Re: about messages from non-members
Mark,
Here's a possible hitch I've come up with. If you are not a Groups.ioExcept in the case of your address being spoofed, I think it would be fair to conclude that your message itself constitutes opting-in for replies to that message. Otherwise what was the point? Messages that pass SPF and/or DKIM I think you can accept as non-spoofed. For the rest, you may be right to immediately return an email confirmation message. On a related note: "Make the subscribe, unsubscribe, and other email commands reliable" https://yahoo.uservoice.com/forums/209451-us-groups/suggestions/5806836 -- Shal
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