On Jun 30, 2018, at 12:06 PM, Arnt Gulbrandsen
<arnt(_at_)gulbrandsen(_dot_)priv(_dot_)no> wrote:
I seem to remember that someone actually uses this... for double bounces?
From: ""@[] or an address target like that.
Qmail, perhaps, but I am fairly sure I have seen two users.
#@[], I think. But it's only used internally to qmail, not over SMTP, so it's
(thankfully) outside our scope.
Cheers,
Steve
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