how fast is email ?
It's pretty fast, but not really super fast, sometimes slow, every once in a while really slow, but not too often.

So, how fast is email ?  
An email makes it to the other side of the planet roughly, at the speed of electricity.
The word electricity refers generally to the movement of electrons (or other charge carriers) through a conductor in the presence of potential and an electric field. The speed of this flow has multiple meanings. In everyday electrical and electronic devices, the signals or energy travel as electromagnetic waves typically on the order of 50%–99% of the speed of light, while the electrons themselves move (drift) much more slowly.

speed of light:
Miles per second: 186,000
Miles per hour: 671 million

From Sun to Earth (1 AU): 8.3 min