On Wed, May 24, 2023 at 07:54:32PM +0200, Ludolf Holzheid wrote: > From RFC 5322: "The message identifier (msg-id) syntax is a limited > version of the addr-spec construct enclosed in the > angle bracket characters, "<" and ">"."
> That is, the less-than and greater-than signs _are_ part of the > message id and are required for standard compliance. OK, but at the bottom of section 3.6.4 of the same RFC: Semantically, the angle bracket characters are not part of the msg-id; the msg-id is what is contained between the two angle bracket characters. (That is in slight contradiction to the syntax diagram which clearly makes the angle brackets part of the definition of "msg-id".) imc
