What is the listserver at hub.org doing? - Mailing list pgsql-general

When I got a new message from Tom Lane at 7:30am in England, I wondered
if he was working on PostgreSQL all night as well as all day, so I looked
at the mail headers and found he had posted in mid-evening his time but
the message had taken 6 hours to be forwarded.

I got curious about the delays in mail forwarding through the mailing
lists and looked at the headers of some messages (see below).  It seems
that a message arrives at hub.org and then gets sat on for a few hours
before it is sent out again.  Sometimes it does an internal loop and
gets sat on twice!  (By comparison, the Debian listserver resends messages
within a minute.)

The result is that messages take a long time to get out on the mailing
list and so are answered unnecessarily by several people.

Why does this happen?


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--
Oliver Elphick                                Oliver.Elphick@lfix.co.uk
Isle of Wight                              http://www.lfix.co.uk/oliver
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     "If a man abide not in me, he is cast forth as a
      branch, and is withered; and men gather them, and cast
      them into the fire, and they are burned."
                                             John 15:6