>I was wondering about asking someone to make a Mailman handler that
>would re-write the From: address after munging to:
>
>From: Jane Doe (j...@example.com) via listname <l...@example.net>
>
>My question now is, is there any reason why re-writing it this way would
>be a bad idea?

Well, of course, it's a bad idea for all the reasons we know that
address munging in general is a bad idea.

By my reading of RFC 5322, this is syntactically valid, but it's
fairly unsusual to put a parenthesized comment into the display name
preceding the angle-addr.  Also, if Jane's name happens to have a dot
or other punctuation in it, that's not valid, e.g. this is wrong:

 From: Jane Q. Doe (j...@example.com) via listname <l...@example.net>

You can quote the whole thing to make it OK:

 From: "Jane Q. Doe j...@example.com via listname" <l...@example.net>

R's,
John
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