Did you say you switched ISP's?
I am ashamed to say that yeeeears back I knew a sysadmin out of Brasil that
didn't have the best of ethics. He tried giving me Telnet access to one of
their mailservers in exchange for an account on a server that I ran.
Needless to say, I don't think its benieth a weird sys admin at an ISP to pull a stunt like this.