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Re: Question for the gurus :-)
"Nick Silberstein" <email@example.com>
> Hi all,
> I'm curious as to why "MAIL FROM: <>" should be/has to be supported.
To avoid bounce loops. It means, "do not send any error report
whatsoever for this message" and is typically used for error reports.
> In particular I am interested in why it should be/could be used by mailing
> list software.
It shouldn't. Some lazy list managers use it, I guess. Easier than
removing invalid addresses from the list.