It doesn't work for user 0 though, so I press enter/next a lot.

So the sysop's mail cannot be filtered?

That seems to be the case. Filters I enter don't work for me although I see nothing in the docs about it.

I have another account on the BBS so I can check how things work/look for an everyday user and the filter works as expected.

I can see the reasoning for that but that also defeats the use of a twit filter/killfile.

Only for my own regular account, user 0. It seems the sysop must read everything!

--- BBBS/Li6 v4.10 Toy-5
* Origin: The Rusty MailBox - Penticton, BC Canada (1:153/757)