guldener.net

Error message on reply to a mail addressed to the mailinglist:

Command died with status 1:
"/usr/lib/plesk-9.0/postfix-mailman". Command output: post script, list not
found: MyMailinglist

Solution:

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Chances are that postfix is not folding the case of the recipient address when passing it to postfix-mailman.
When you create the list, for example Beirat, mailman creates the files on disk in lowercase and when it checks for the existance of the list, it checks in lowercase. When you send mail to Beirat@listserver.domain, postfix passes this onto postfix-mailman as "postfix-mailman post Beirat Beirat@listserver.domain". Mailman then can't find Beirat. Chances are if you send it to beirat@listserver.domain it would have worked. To fix this change the following line in /etc/postfix/master.cf

to

Note the "u" in the flags option, which folds the recipient name to lowercase.
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Source: http://forum.parallels.com/showthread.php?t=101961