Speaking of email ...
When I was in the Navy and stationed at a research facility back in the days of Eudora email and Windows 3.1, I was called to a department head office and asked why her computer was so slooowww.
Upon checking her computer, she had her email set to check for new email every minute.
Needless to say, 286-class computer, Windows 3.1, and new-fangled networking with email set to check every minute, .....
Her reasoning was that if someone emailed her she needed to respond Right Now (tm).
After suggesting to her that if someone needed an answer Right Now (tm) then they would use the phone sitting next to her computer.
Upon resetting her email to check every 15 minutes her computer ran fine.