The email server is basically a computer program or set of programs, which sends the email messages from the system of clients to intended recipients. Even some can be accessed on the internet, while others are specially made for any business purposes or organization with specific limitations and specifications that could apply. Now, the internet allows the users to make their own emails. You can also get limitless resources with related to different email servers, which cater to the clients with a host of services that include trash mail control and spam or virus protection, unlimited mailbox storage space, content filter, safe acquisition of profile password and information and lots of advanced web mail features added with the certain form of server you have. The server you use to handles the effective delivery of emails from the clients to your recipient mail box either via the outside mail servers or same kind of server itself. However, it is completely free to use. Primarily, the mail servers can be categorized into dual forms such as incoming and outgoing mail server. The incoming mail servers come in two forms such as IMAP and POP3. The outgoing mail servers are also called as SMTP.