As it turns out, this was not a mailman issue, but a sendmail issue. Sendmail is set to look up MTAAliases in our ldap database. Once I changed the order of operations in the sendmail.mc 'AliasFile' directive to look at the local aliases.mailman file first before checking the ldap database, all worked as I felt it should.

Thank you.

Karen R McArthur wrote:
I'm placing mailman into production for the first time - and I have approximately 2500 lists. Many of my lists work fine, but many do not. On them, I receive a "user unknown" error. An example: when send to the "seo" list, sendmail -bv [EMAIL PROTECTED] returns "[EMAIL PROTECTED] User unknown"

I have the seo lines in aliases.mailman - and a strings on the aliases.mailman.db returns correct data for the list. Some lists listed in aliases.mailman AFTER seo work correctly, as do some lists listed BEFORE it - elimination my idea of a corrupt file.

aliases.mailman was generated through "sudo -u mailman bin/genaliases -q > aliases.mailman".
I have run newaliases.
I have restarted mailman.
sendmail.cf includes /etc/aliases.mailman in the ALiasFile line - and is working as it should since some of my lists are working.

aliases.mailman is 28,896 lines long - is that a problem?

Any ideas?

ls -ltr aliases.mailman*
-rw-r--r--   1 mailman root     1845123 Oct 15 12:37 aliases.mailman
-rw-r-----   1 root    smmsp    2646016 Oct 15 12:38 aliases.mailman.db

strings aliases.mailman.db | grep seo
"|/usr/lib/mailman/mail/mailman bounces seo"
seo-bounces
"|/usr/lib/mailman/mail/mailman confirm seo"
seo-confirm
"|/usr/lib/mailman/mail/mailman leave seo"
seo-leave
"|/usr/lib/mailman/mail/mailman join seo"
seo-join
"|/usr/lib/mailman/mail/mailman admin seo"
seo-admin
"|/usr/lib/mailman/mail/mailman owner seo"
seo-owner
"|/usr/lib/mailman/mail/mailman unsubscribe seo"
seo-unsubscribe
"|/usr/lib/mailman/mail/mailman subscribe seo"
seo-subscribe
"|/usr/lib/mailman/mail/mailman request seo"
seo-request
"|/usr/lib/mailman/mail/mailman post seo"

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