I've decided to cease reading email after 6:00 p.m. I find that most emails are either spam, bad news or irritating. With the time difference, they seem to arrive around the time I am winding down from my generally productive day or preparing for bed.
This means my good night's sleep is interrupted or terminated, depending on the level of irritation derived from the email.
At least when receiving such news in the morning, one has the day to process and resolve the impact.
Herewith decided and seconded. fin.