42, 032,786 people
1.2 billion in 2007
Many people use email. It is just not as popular as facebook or myspace anymore. I use it. :)
Almost everyone in the United States of America over the age of 7 have an email. Almost all of these people actually use their email.
over one million people have a email adddress
The number of people you can add to your email list depends on which email you use. It seems like regardless of which you use it is a rather large number and you will probably not max it out.
people who generally don't have internet connection and children
Many people use web based email all the time.
The amount of email the average person sends depends on a lot of various factors. If they use email for business, if they use email to keep in touch with family, how many friends they have who also use email, etc. For many people, the number is between 3 and 7.
Most email services now a days are free to use. Yahoo's email service is also free to use for the public. This is beneficial because not many people want to pay for email.
About 70% of people in the world use mobile.