List Status Test.

[Bill Campbell]

On Sun, May 14, 2017, Jean-Pierre Radley via Filepro-list wrote:
>Mark Luljak averred (on Sat, May 13, 2017 at 07:26:45PM -0400):
...
>| I can't independently confirm.  I'm only getting single copies.  Unlike
>| JPR, I -don't- have anything checking Message-IDs for duplicates and
>| tossing them, so I'm getting no duplicates.

The Message-ID headers aren't changed, and will pass through to
each recipient.

I have Mailman configured to use VERP so that a distinct email
goes to each recipient with information coded to allow me to
track back to the recipient in case of bounces.  An effect of
this is that our postfix mail server assigns a unique identifier
to each message that should appear in the Received: headers on
the recipient's system.

>Over the last ten days, I've had duplicate messages, but SOLELY
>from the list administrators, i.e. duplicates JUST from Mark Luljak and
>Bill Campbell. :-(

I see that mail to jprfp at jpr.com is delivered to an intermediary,
jpr-com.p10.spamhero.com[208.53.48.152] so perhaps something
weird is going on there?

>Less than ten instances altogether, but I've saved none of them so I
>have no details to offer.

Bouncing each received message of the duplicated messages to
<postmaster at celestial.com> would be helpful (e.g. mutt's bounces
which retains full headers).

Bill
-- 
INTERNET:   bill at celestial.com  Bill Campbell; Celestial Software LLC
URL: http://www.celestial.com/  PO Box 820; 6641 E. Mercer Way
Voice:          (206) 236-1676  Mercer Island, WA 98040-0820
Fax:            (206) 232-9186  Skype: jwccsllc (206) 855-5792

In my many years I have come to a conclusion that one useless man is a
shame, two is a law firm and three or more is a congress.  -- John Adams