Can Mailman ignore vacation messages?
Mailman currently ignores any message marked with a “Precedence: Bulk” header which some vacation programs add to vacation messages. If the vacation message does not contain such a header, however, you will need to manually configure your Mailman list to moderate (but not ignore) certain messages based on other information such as keywords in the Subject line. To do so, log in to your list’s admin pages at https://mailman.u.washington.edu/mailman/admin/listname where listname is replaced with the actual name of your list. Once you are logged in, follow the links to the Privacy Options > Spam filters section. There you will find the “bounce_matching_headers” setting which will already contain some values. Add the following line in the text box: Subject: .*keyword where “keyword” is replaced with typical vacation subject line text. For example, Subject: .*vacation will catch all messages with the word “vacation” in the subject line. Another typical subject line for a vacation message is
