mail app keeps opening on its own?

The mail app keeps bringing itself to front randomly on its own. If the app is completely closed (quit out) it won't open on its own, but if i just close the window or hide it, eventually it makes itself visible once more. It seems to happen more so when I'm waking the mac from sleep. i have a comcast, iCloud, and 2 gmail accounts signed into mail currently. I feel like it might be caused by one or both of the gmail accounts but i don't know what setting might be causing it to happen....

let me know if anyone needs to see log files or settings that i have configured in mail.

Thanks in advance 🙂