To snoop or not to snoop.

I have a daughter in school out of state. I have always respected the kids privacy but I am now concerned she is getting into something that may (will) have very serious long term implications. My concern is taking presidence over her privacy. I have attempted to talk, but didn’t make much headway. There are 2 problems. My guilt over doing this and I don’t have the vaguest idea how to get into her comcast account. I only need to look at a couple of messages to make sure and don’t want her to know I didn’t trust her.