Hi, I found these instructions, not sure if accurate or still applicable:
https://mail.python.org/pipermail/mailman-users/2007-April/056468.html
On Wed, May 9, 2018 at 9:28 AM, Martin Urbanec <martin.urbanec(a)wikimedia.cz>
wrote:
If there is a way how to enforce manual adding by a
list administrator,
I'll be happy, but helping how to add whole
aol.com to ban_list will be
useful. I tried to add "^.*(a)aol.com$" (a regex) to the ban_list variable,
but this apparently do not help, still some aol addresses are able to sign
up.
--
Jaime Crespo
<http://wikimedia.org>