The Thunderbird filter I use looks like:

On Fri, Apr 28, 2017 at 11:15:52AM +0530, Avinash Sonawane wrote:

Hello!

I am subscribed to handful of mailing lists and I'm sure many of you
are too. It gets pretty overwhelming when I check my mailbox at the
end of day or after couple of days.

I would like to request the admins/owners to add [Cypherpunks] at the
beginning of a subject by default to easily spot the mails from
Cypherpunks list. This can be easily done by tweaking the appropriate
Mailman settings and I can see that we are using Mailman to manage
this list.

What do you guys think?

Make a mail filter that prepends "[Cypherpunks]" (or whatever) to every
cypherpunk list message, if you don't want to sort into its own box. 

Of course, that has the disadvantage of (sort of) breaking replies,
because the subject has changed...

John