message won't post/Posfix/Mailman issues

This is a reocurring problem with one list that I host. It has 40,000 subscribers and only one subscribed address can post and I am an allowed non-subscriber who can post. When either the subscriber or I post to the list, the message is not delivered, but the Postfix maillog shows this:
May 2 11:07:56 webhost postfix/local[13508]: 4ED8F4E538: to=<listname@wherever.com>, relay=local, delay=0, status=sent ("|/lists/mail/ mailman post listname")
However, there is nothing in the Mailman/post log that shows that it reached Mailman and obviously, the message isn't posted. This may be a Postfix issue, but I am posting it to the Mailman list since it appears that the message just isn't reaching Mailman.
-- Christopher Adams

At 11:30 AM -0700 2005-05-02, Christopher Adams wrote:
However, there is nothing in the Mailman/post log that shows that it reached Mailman and obviously, the message isn't posted. This may be a Postfix issue, but I am posting it to the Mailman list since it appears that the message just isn't reaching Mailman.
You need to also look in all of the Mailman logs, to see what it
thinks has happened to that message.
-- Brad Knowles, <brad@stop.mail-abuse.org>
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety."
-- Benjamin Franklin (1706-1790), reply of the Pennsylvania
Assembly to the Governor, November 11, 1755
SAGE member since 1995. See <http://www.sage.org/> for more info.
participants (2)
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Brad Knowles
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Christopher Adams