The cost to you for email has nothing to do with distance, and in many cases, the cost doesn't depend on the size of the message. Most Internet access charges are based on the number of hours per month you access the Internet, or you pay a flat monthly fee. Limitations Email isn't necessarily private. Since messages are passed from one system to another, and sometimes through several systems or networks, there are many opportunities for someone to intercept or read email. Many types of computer systems have protections built in to stop users from reading others' email, but it's still possible for a system administrator to read the email on a system or for someone to bypass the security of a computer system.
Some email systems can send or receive text files only.
Even though you can send and receive images, programs, files produced by word processing programs, or multimedia messages, some folks may not be able to properly view your message. It's possible to forge email. This is not common, but it is possible to forge the address of the sender. You may want to take steps to confirm the source of some email you receive. It's difficult to express emotion using email.