Rnaiming bogus system mailbox

I have problem with procmail, continiously renaiming one of my users
system mailbox into a BOGUS.$USER.yc0
My box is running Linux 2.2.16, qmail and procmail v.3.14.
Any kind of help will be precious.
Thanx



_______________________________________________
procmail mailing list
procmail(_at_)lists(_dot_)RWTH-Aachen(_dot_)DE
http://MailMan.RWTH-Aachen.DE/mailman/listinfo/procmail