FAQ
I have one mailing list that for every message sent to the list I, as
admin, receive the following "Uncaught Bounce Notification":
The attached message was received as a bounce, but either the bounce
format was not recognized, or no member addresses could be extracted
from it. This mailing list has been configured to send all
unrecognized bounce messages to the list administrator(s).

For more information see:
http://my_website.org/mailman/admin/ascls-co-leaders_my_list.org/
bounce



From: Mail Delivery Subsystem <MAILER-DAEMON at tempest.organization.org>
Date: May 13, 2008 9:29:30 AM MDT
To: <ascls-co-leaders-bounces at my_list.org>
Subject: Returned mail: see transcript for details
Clicking on the "For more information" link just takes me to the
Bounce config page in the list admin section. I'm not getting any kind
of transcript.

Looking at the bounce log for this particular email shows the following:
May 13 09:29:26 2008 (21967) bounce message w/no discernable
addresses: <200805131529.m4DFTUVH029147 at tempest.organization.org>
May 13 09:29:26 2008 (21967) forwarding unrecognized, message-id: <200805131529.m4DFTUVH029147 at tempest.organization.org

My guess here is that for some reason tempest.pvhs.org is sending some
kind of response to the list that is getting bounced for whatever
reason. I do have several subscribers at that facility, but have not
heard that any of them are not receiving the emails from the list.

Any ideas on how to I might proceed to figure out why I'm getting this
bounce, and therefore maybe figure out how to prevent it?

Thanks,

J.R.




J.R. Constance
Rodric Consulting, LLC
jrc at rodricon.com
http://www.rodricon.com
Phone: 720.339.3646

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  • Mark Sapiro at May 13, 2008 at 9:44 pm

    J.R. Constance wrote:
    I have one mailing list that for every message sent to the list I, as
    admin, receive the following "Uncaught Bounce Notification":
    The attached message was received as a bounce, but either the bounce
    format was not recognized, or no member addresses could be extracted
    from it. This mailing list has been configured to send all
    unrecognized bounce messages to the list administrator(s).

    For more information see:
    http://my_website.org/mailman/admin/ascls-co-leaders_my_list.org/
    bounce



    From: Mail Delivery Subsystem <MAILER-DAEMON at tempest.organization.org>
    Date: May 13, 2008 9:29:30 AM MDT
    To: <ascls-co-leaders-bounces at my_list.org>
    Subject: Returned mail: see transcript for details
    Clicking on the "For more information" link just takes me to the
    Bounce config page in the list admin section. I'm not getting any kind
    of transcript.

    Looking at the bounce log for this particular email shows the following:
    May 13 09:29:26 2008 (21967) bounce message w/no discernable
    addresses: <200805131529.m4DFTUVH029147 at tempest.organization.org>
    May 13 09:29:26 2008 (21967) forwarding unrecognized, message-id: <200805131529.m4DFTUVH029147 at tempest.organization.org

    My guess here is that for some reason tempest.pvhs.org is sending some
    kind of response to the list that is getting bounced for whatever
    reason. I do have several subscribers at that facility, but have not
    heard that any of them are not receiving the emails from the list.

    More likely, what is happening is there is a list member whose mail is
    sent directly or indirectly (after a forward of some kind) to the
    server at tempest.organization.org. This mail is undeliverable by that
    server so it is sending some kind of DSN indicating the delivery
    problem back to the list-bounces address
    <ascls-co-leaders-bounces at my_list.org> which is exactly what it is
    supposed to do.

    Mailman is unable to determine the bouncing address from the DSN which
    is not surprising if it consists only of the four headers you quoted
    with no other information in a body or attachment, so Mailman forwards
    the unrecognized bounce to you.

    Now it is clear from the bounce log that the message contained at least
    a Message-Id: header in addition to the four quoted headers. What else
    is in that message that your MUA is not showing to you? Can you view
    the raw message source? If your MUA is the same Apple Mail you sent
    this post with, open the message and select Message -> Raw Source from
    the View menu and see if that gives you more information.

    Any ideas on how to I might proceed to figure out why I'm getting this
    bounce, and therefore maybe figure out how to prevent it?

    You prevent it by removing the offending address from the list. If the
    above doesn't help find the address, you need to temporarily at least
    set

    VERP_DELIVERY_INTERVAL = 1

    in mm_cfg.py and then restart Mailman. This will cause each message to
    be sent individually to each user with envelope from
    <ascls-co-leaders-bounces+user=example.com at my_list.org> where
    user at example.com is the member address. Then, when it bounces, both
    Mailman and you will know what address is bouncing.

    Note that if you have one and only one list member whose address is in
    the organization.org domain, you could try temporarily disabling
    delivery to that member, and if that stops the notices, you've found
    the undeliverable address.

    --
    Mark Sapiro <mark at msapiro.net> The highway is for gamblers,
    San Francisco Bay Area, California better use your sense - B. Dylan

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postedMay 13, '08 at 7:09p
activeMay 13, '08 at 9:44p
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J.R. Constance: 1 post Mark Sapiro: 1 post

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