On Wed, 30 Oct 2013 11:06:35 -0500 Adam Moffett <adamli...@plexicomm.net> wrote:
> I'm reasonably sure that user@ip makes a valid address, but even if > it is I don't think I've ever observed it anywhere. My reading of RFC5321 seems to indicate that "user@1.2.3.4" is NOT a valid address. It should instead be written as "user@[1.2.3.4]" RFC5321 covers envelope addresses. RFC5322 covers header addresses and also suggests that address literals need to be written as [1.2.3.4] rather than 1.2.3.4. Regards, David.
