On Tuesday 02 January 2018 at 11:12:57, Rupert Gallagher wrote:
> This is the normative reference.
I've picked out the significant parts from your email...
> RFC 5322, pg. 27, section 3.6.4
> ---------------------------------------------------------------
>
> << The message identifier (msg-id) itself MUST be a globally unique
> identifier for a message.
> a good method
Note: not the required method, not the only method, just "a good method".
> is to put the domain name (or a domain literal IP address) of the host
> on which the message identifier was created on the right-hand side of
> the "@" (since domain names and IP addresses are normally unique)
> Though other algorithms will work, it is RECOMMENDED
Note, recommended, not required.
> that the right-hand side contain some domain identifier (either of
> the host itself or otherwise)
Antony.
--
Most people are aware that the Universe is big.
- Paul Davies, Professor of Theoretical Physics
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