Pianomail question--how can i block a sender?

[janice]

I use the Pianomail program.  It's wonderful, by the way!  I have 2 e-mail addys, a well-known one (which is my main one) and one that I use for chat correspondence only (the pianomail is for this).  I get alot of forwarded messages there--poems and stuff.  Anyway, some guy, who I never gave my addy to, is sending me forwards and clogging my mailbox!  How can I block him?  I don't even know him!  He got my address off of another forward!  So.......since this isn't my "main" email program, I've been trying to find where it is written somewhere just how I can go about blocking him, but I can't find it!  Someone please help me!!