[Mailman-Users] Regexp for blocking addresses

I am trying to block variants of ceertain gmail addresses but I'm having trouble concocting the right rexexp to accomplish the task.

Gmail addresses can contain embedded periods and can be followed by a '+' and an arbitrary suffix. So all the following are the same address: * joebloe@gmail.com * joe.blow@gmail.com * j.o.e.blow@gmail.com * joe.blow+abcd@gmail.com

And so on. I've tried various regexps, but none have worked so far.

 1. Could someone show me the right syntax to catch all embedded
    dots in the part before the '+'?
 2. Is there a way to script removing all my experimentation from
    the ban lists on multiple mailing lists?  Things are looking
    pretty cluttered by now on the privacy admin pages.

Thanks very much in advance.

Matthew Saltzman Clemson University Math Sciences mjs AT clemson DOT edu