check email due:today wait:due remind:1d priority:H +daily
This is the sole task I use priority upon, to ensure it is the first thing I do each cycle.
I don’t really love email, I actually kinda hate it. I try not to use it as often as possible. So I check my mail first thing in the morning. And then I’m done for the day! 
Well, mostly. I still occasionally have to check mail for confirmation messages and such.
I practice inbox zero, which means replying to all the messages requiring correspondence, and documenting information I need to keep for whatever reason: I normally do so by saving the email as a text file in an appropriate ~/docs sub-directory.
The point is: when someone emails me, it doesn’t stay as an email message in an inbox; it is deleted after moving into my knowledge system. And I process it once a day.