What the hell?

When I got home today my boyfriend told me that the firewall software popped up a message saying Limewire was trying to send email and gave a destination IP. He blocked permission and wrote down the address (good boy!), and I did a Whois query. I called this ISP and told them what was happening. Dude was useless. First he tried to tell me that this is how Limewire communicates file listings (thru friggin' SMTP??? since when???). Then he told me that they don't support Limewire or any other peer-to-peer. I was like "Yeah, that's all fine and dandy, but it just so happens to be a peer-to-peer that's doing it. That's not the point. NO software program of mine should be asking permission to send email to someone on your network. Don't you care if one of your customers is trying to hack?" He basically said they don't because it's Limewire and Limewire is bad and shame on me, though not in those words.

I did a quick search thru the forum, but I found nothing relating to the topic. IS the jerk right and this is a normal thing that Limewire does?

Thanks tons in advance!