Hello, We have a list running on Mailman version 2.1.20.
Over the last several days began receiving hundreds of bot subscription
requests (all gmail addresses).
All of format like:
blech+12345...@gmail.com
zark+98765...@gmail.com
In attempt to solve this issue, entered the following regex lines in
Privacy Options -> Subscription Rules -> ban_list
^.*blech
^.*zark
Temporarily did the job, but the bot(s) adapted and changed the prefix
of the address string to:
crap+12345...@gmail.com
grum+98765...@gmail.com
Common to ALL of the bot subscribe requests is including within the the
email address a "+" symbol.
So I tried entering RegExp ^.*+ but Mailman rejected this entry.
But was able to enter RegExp of ^.*/+
However that allowed all the bot spam requests through.
Unable to keep up with the bots changing the address prefix.
Can anyone recommend an example of a RegExp entry which would
prevent/solve this dilemma?
Note: I've searched the Mailman-Users list archives and noted Mr.
Yardley's recent posts, but not able to implement his solution as I
don't have access the server. (so also unable to configure
SUBSCRIBE_FORM_SECRET solution).
Thank you for any ideas.
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