Your email message was unable to be sent - BUT I don't use email in my computer

I have been getting several messages like the one on title when I leave my computer on. I currently only use it for gaming, haven't logged into my email at all. To me it looks like my PC is being used a bot to send spam email as I get hundreds of alerts if I leave my computer on and unattended. I updated Norton and ran full scans and nothing comes up, please help. I attached one of the logs from the block history but didn't get a picture of the pop up alert.