Okay. From what I can gather.

Iskall sent Joel so much love mail while he was on vacation, as a prank to fill up his inbox, but he didn't sign them to make it look like it was Etho. But I think he actually liked Joel in some regard so when Joel found out it was him, Joel said he wanted a restraining order. Now Iskall is going after the real bad boy, Joel's babe, Jimmy, as revenge...