How did he get any work done?
That works out to 41 emails a day.
Or, to put it another way, about 3 per waking hour.
A lot, but a possible number.
He didn’t. He spent all his time spanking the monkey while having email sex.
Re “How did he get any work done”? Well, it’s all in how you define “work”. (Hattip to Bill Clinton).