find_member - Find all Mailman lists that a member's address is on
find_member [options] regex [regex [...]]
-l listname, --listname=listname
Include only the named list in the search.
-x listname, --exclude=listname
Exclude the named list from the search.
Search list owners as well as members.
Append the alias setting recommendations to file, in addition to
printing them to standard output.
Print a small help text and exit
A Python regular expression to match against.
The interaction between -l and -x is as follows. If any -l option is given
then only the named list will be included in the search. If any -x option is
given but no -l option is given, then all lists will be search except those
Regular expression syntax is Perl5-like, using the Python re module. Complete
specifications are at: