ietf-smtp
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Re: [ietf-smtp] FWD: [Technical Errata Reported] RFC5321 (5414)

2018-06-30 14:08:58
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.

Arnt

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