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Re: I-D Action:draft-klensin-rfc2821bis-10.txt

2008-04-25 07:28:48

Tony Finch writes:
On Fri, 25 Apr 2008, Paul Smith wrote:
The envelope sender for automated mail just be blank. That's defined as the address you use if you don't want a bounce.

A null return path should not be used on a message unless it conforms to one of a few standards-track types. RFC 2821 section 4.5.5.

2821 4.5.5 lists some types for which you should use the null path. It doesn't forbid using <> for types not on its list.

3461 5.2.2 (d), 3834 3.3 and 5230 5.1 add to the list, and I would not be surprised if other RFCs add more and code does even more.