OT: General request: Blocking/filtering using Eudora

[Simon Dawson <si@xxxxxxxxxxxxxxxx>]

Off topic, but unfortunately relevant.

Does anyone know if there is a way to (using Eudora, my current client) 
block/filter all mail from, say, our dear friend PO, -and- all comments 
replying to his messages?

I only notice because the Signal to Noise ratio seems to plummet whenever 
he starts 'contributing' to the list. I've read it all in the past, and 
there's only so many hours in the day, I'd prefer to not have to wade 
through it all..

Any ideas?

Thanks

Simon