[ih] update about bogus list unsubcribe requests

[Brian E Carpenter]

Apparently, "Apparently-To:" SHOULD NOT be used [RFC5321]. It isn't present
in list mail that reaches me, so it must have been added downstream for that
particular subscriber.

http://docstore.mik.ua/orelly/other/Sendmail_3rd/1565928393_ch25-77071.html

Regards
   Brian

On 27/08/2016 06:05, Joe Touch wrote:
> Hi, all,
> 
> The issue appears to be that one subscriber to this list was using a
> commercial service that automates list removal. That service, Vade
> Secure, appears to have a bug in their software. It was issuing
> unsubscribes based on the "From:" address, rather than based on the
> "Apparently-To:" address.
> 
> The email that triggers this has been removed from the list. We've also
> alerted Vade Secure about the bug. I've tested this over the past day
> and seen no notices.
> 
> A big thanks to John Levine, who helped debug the issue, and Adrien
> Gendre at Vade Secure for helping us identify the email subscriber directly.
> 
> If the issue persists, please do let me know directly - I'll continue to
> monitor unsubscribe requests to see if this pops up again.
> 
> Joe (list admin)
> 
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