Boyfriend got a message from Zoosk?

Margot

My boyfriend's email account is connected to my phone and he got an email from Zoosk. It looks like an old account but after being cheated on by my exes I'm afraid he may have used it recently while we went through a rough patch due to stress. I know I'm being crazy but I'm so afraid to lose him. Has anyone had this happen and it turned out alright?