E-mail can be divided into two kinds, namely e-mail based on SMTP / POP and web-based e-mail. The following description of a web-based e-mail and e-mail based on SMTP / POP:
1. E-mail-based SMTP / POP
E-mail based on SMTP / POP (Simple Mail Transfer Protocol / Post Office Protocol) is the e-mail server using SMTP / POP, which is a computer that can send e-mails from the user to the e-mail address of the destination and vice versa. In order to use e-mail on the server SMTP / POP, the user must have an account on the server SMTP / POP. In addition, users also have to use a mail client software to read and send e-mails from and to the server SMTP / POP. If the server has to provide Telnet service, then the user can log into the server machine, then run the mail client software on the server.
However, if the server does not provide Telnet service, then the user must have a mail client software such as MS Outlook, Eudora, MS Outlook Express, Pegasus, and Netscape Communicator. In order to use the mail client software, users must melakukkan setting or setting some information, such as name (IP address) server SMTP / POP, the user name (user name / user ID) and password to the e-mail server.
In server SMTP / POP, all e-mail sent to the user and already have an account on the server will be stored in a directory. Then, when the user contacts the server, all e-mail addressed to him will be sent to the client computer. Conversely, when the user wants to send an e-mail to an e-mail address, the e-mail will be sent to the server SMTP / POP and then be forwarded to the addressee.
2. Web-Based E-mail
Web-based e-mail is different from POP-based e-mail. In the Web-based e-mail, users do not need to have a POP account on the server SMTP / POP for e-mail access via the Web Mail dilakukkan using a browser. On the internet, we can use sites that provide e-mail services (webmail) free such as Yahoo (mail.yahoo.com), Google (Gmail.google.com), Hotmail (www.hotmail.com), etc..
In addition to e-mail for free, there are also e-mail subscription through an ISP (Internet Service Provider), such indonet.com, telkomspeedy.com, wasantara.com, elganet.com, and others. However, usually an e-mail from an ISP-based e-mail SMTP / POP.
advantages of e-mail
- have Leisure
With the e-mail we will have the ease of sending an e-mail will also be faster. Can be compared to sending a letter through the post office. To send through the post office, various preparations have to be done first before sending the letter. For example, should prepare envelopes, stamps, glue and so on. It must take a long time. Not only that, by sending a letter by e-mail costs less required. Spending money for postage rates and postal office if sending by e-mail no longer needed. Another advantage offered is to send many letters to address different objectives at once in the same time.
- Comprehensive / Global
Email can be used by anyone, anywhere, and at any time as a means of communication throughout the world. We can save the e-mails on the server that will not go away unless removed. Messages sent multimedia messages are not just text (writing) only. Fill in the e-mail may include images, photos, videos, programs, and even sound.
Drawbacks of e-mail
- Sent to Wrong Address
When an e-mail containing important documents one address, it is possible that the document is misused. While the e-mail address must be in accordance with the rules of writing that I've mentioned above.
- prone Tapping
There is a possibility of e-mail we intercepted another person. By the time we send e-mails, e-mails actually passed a lot of other servers. Therefore, when an e-mail containing sensitive or confidential contents should we take precautions to randomize (encrypt) data in the e-mail.
- E-mail Spam and Falsification of Identity
Sometimes a lot of incoming e-mails coming in repeatedly, whereas e-mails are not at all we want, this is called the e-mail spam (junk e-mail). Examples of e-mail spam is e-mail that contains the advertisement of a product, extortion, and fraud. All e-mail users certainly do not want it.
Make it easy to e-mail. but therefore, sometimes there is a person who intentionally falsified his identity. We can not ascertain the identity of a person just by knowing the e-mail address has.
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