FAQ
Dear friends

Some of my Mailman mailing list members are not getting the emails that
the other members are receiving. Do you have any idea what could be
involved here, and where I should look for the source of the issue?

I have 3 Mailman mailing lists - 'Activists' has 98 members and gets
about 10 messages/week, 'Chat' has 194 members and gets about 2
messages/week, 'Triangle' has 129 members and gets about 20
messages/week. In addition I have 2 other lists that are too sleepy to
mention.

Could it be something to do with spam blacklists? Very occasionally one
of the messages arrives tagged as ***SPAM*** so something, somewhere, is
making a guess that it was spam. I have searched for the domain name
headingley.org and the shared IP address 195.216.196.131 on some
blacklist searches but it doesn't show up.

In one case of a couple, who are both members, one receives some
messages that the other does not and visa versa. One is @ntlworld.com
and the other is @yahoo.co.uk.

In another case of a couple, who are both members, one received a
message which the other did not. Both are @btinternet.com.

Its hard to say how prevalent this problem is as none of my punters know
about messages which they are not receiving.

Any ideas of how I can trace the fault?

Many thanks
Nigel
--
Headingley Community web site
www.headingley.org

Search Discussions

  • Stephen J. Turnbull at May 12, 2009 at 8:27 am
    nigel white writes:
    Some of my Mailman mailing list members are not getting the emails
    that the other members are receiving. Do you have any idea what
    could be involved here, and where I should look for the source of
    the issue?
    Mail is a very complex system, many things could be involved.

    "Tracing", rather than guessing what the problem is, is the best way
    to go about it. First, check the Mailman logs (bounce, smtp,
    smtp-failure are the obvious candidates). Try to correlate events
    with the addresses you know are valid but not receiving some posts.
    Then you want to look at the SMTP logs for your MTA. If nothing is
    amiss there, it's quite possibly spam filtering at the remote host,
    and your users will have to complain to their ISPs in most cases.
    Some large ISPs have special staff to deal with this kind of problem,
    though.

    See also the FAQ which has at least a couple of entries dealing with
    apparent non-delivery.
  • Adam McGreggor at May 12, 2009 at 2:33 pm

    On Sat, May 09, 2009 at 05:54:42PM +0100, nigel white wrote:
    In one case of a couple, who are both members, one receives some
    messages that the other does not and visa versa. One is @ntlworld.com
    and the other is @yahoo.co.uk.

    In another case of a couple, who are both members, one received a
    message which the other did not. Both are @btinternet.com.
    Both yahoo.co.uk and btinternet.com mail runs through much of the same
    mail infrastructure.

    There are issues relating to this, that have caused the various "us"es
    that I do stuff for, immense problems.

    (to the extent we went on the name-and-shame approach on Twitter, in one
    case. That got responses)

    Try changing the retry times & queue-lengths in your MTA for
    yahoo/btinternet/btopenworld &c, perhaps. If you don't know how to do
    that, RTFM/(Search, and then, if necessary, ask the appropriate lists.

    <http://lists.exim.org/lurker/thread/20090421.100820.02f7d637.en.html#20090421.100820.02f7d637>

    <http://is.gd/zbcg>
    may be of interest, if you use Exim.

    --
    If you see a long line of rats streaming off of a ship, the correct
    assumption is not `Gosh, I bet that's a real nice boat now that those
    rats are gone.' (Mike Sphar)

Related Discussions

Discussion Navigation
viewthread | post
Discussion Overview
groupmailman-users @
categoriespython
postedMay 9, '09 at 4:54p
activeMay 12, '09 at 2:33p
posts3
users3
websitelist.org

People

Translate

site design / logo © 2022 Grokbase