[Mailman-Users] Easy question for this crowd

[Chip Davis]

I've supported a dozen Mailman listservers for over a dozen years. 
This doesn't represent much real effort most of the time.  I've had to 
block specific users often and specific domains rarely, but this is 
the first time I've had to block an entire TLD.

Recently I've been gifted with an inordinate amount of UCE from many 
different domains under the '.icu' TLD.

Since Python RE's are _almost_ the same as the UNIX RE's I used many 
years ago, if I put

^@.*\.icu$

in discard_these_nonmembers, will it block all domains in that TLD?

And not block anyone else?

Thanks,

-Chip Davis-

Mailman 2.1.27
shared host
linux 2.6.32-696.18.7.el6.x86_64
cPanel 80.0.10