Hello,
According to the Reply-To: header, the user apparently wants to receive a reply not only to the list, but also the his personal mail address.
My Reply-To header is a standard. It's defined at 'Einstellungen' -> 'Identitäten'
If the mailinglist is running with mailman it's possible to change two settings: first_strip_reply_to: Yes reply_goes_to_list: This List then all outgoing mail will have a Reply-To the mailinglist header.
Best regards from Germany
Ulli
P.S.: I've changed my main.inc. My RC-Version is visible. Thanks.