[Mailman-Users] Messages delivered out of order and delayed
Jim Ziobro
list at ziobro.rochester.ny.us
Sat Sep 14 00:30:31 EDT 2019
Indeed email is not a synchronous messaging channel. But most email
clients will sort incoming messages by header Date thus undo the effects
of out-of-order delivery.
Even if you send out two messages in a row to joe at gmail.com there is
no guarantee that both messages go to the same machine. The two
receiving machines may have different loads and may not even be running
the same software.
Almost all email MTAs send out smaller messages first. In general that
is a good thing. It virtually guarantees out of order delivery for a
rapid discussion.
The wild random delay is not unique to Mailman. I had a Yahoo Group
with a couple hundred addresses. Some messages went in seconds but
every once in a while messages took days to get delivered sometimes to a
subset of the members. This happened even to @yahoo.com recipients!
Ciao,
//Z\\
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