A given machine may have more than one domain name, but a given domain name points to only one machine. Well it's not as difficult as it might seem. Just give us a domain name and we will do it for you at Rs. 1000 per year upto 10 years. We use bulkregister to register domains.
Email stands for Electronic mail.
Messages, usually text, can be sent from one person to another via computer. POP3 stands for Post Office Protocol 3. A protocol used to receive e-mails from a mail server on the Internet to a local machine. A protocol used to transfer e-mail between computers. There are other programs also available on the Internet for the same purpose, but these are some of the commonly used ones.