1 | Electronic Mail and Messaging |
2 | Electronic mail is implemented by a network of computers. When the originator of a message sends it, the first computer to receive it stores it, and then checks to see if the recipient is local to that machine, If not, the message is sent on in a chain-like fashion from computer to computer until the message arrives at the recipient's machine. This technology is sometimes called store and forward. When security issues are involved, one can encrypt the message. |