On 1 Jan 2018, at 9:59 (-0500), David Jones wrote:
I think some mail systems will keep the same message-ID per email
thread so your system must reject some replies.
On 01.01.18 10:29, Bill Cole wrote:
I have not seen such behavior in the past 20 years...
Intentionally re-using another site's MIDs is so wrong that I'd
happily make it break hard.
HOWEVER, the idea of enforcing any standard on MIDs beyond gross
format (e.g.: <[[:ascii:]]{3,996}>) on a system where the admin isn't
the sole user is ludicrous.
the gross format in RFCs 822,2822 and 5322 describes message-id consisting
of local and domain part, thus is must contain "@".
--
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