POP3 ،IMAP و Exchangeرضا جابری
There are many email services today, and you can even create your own email when you buy a domain and space on the Internet. Sending and receiving emails in writing, clicking the submit key, and checking the items in the inbox are summarized, while behind the scenes many processes are underway to receive and send an email. It does not matter if you use the famous services such as Yahoo, Atoll, Gmail, or your website’s email service on a daily basis. If you try to use management software, you will encounter options and issues that each have a certain meaning. In the following, we will look at and explain a number of obscure but commonly used concepts used in email.
It’s best to look at the basic concepts and definitions before looking at the description of the protocols used for emails. What is the difference between webmail and email client? If you use services such as Yahoo, AOLUK or Gmail and you go to your email account to check your emails using your Internet browser, then you are using Webmail. But a number of software companies such as Microsoft and Mozilla have created apps and software for managing emails, which are called e-mail clients.
Webmails and email clients do not have much difference in performance, and both are apps that use email. To use webmail, it’s enough to open your browser and enter the address of the service you want to navigate to the login screen, while you must download and install the app or software to use the email client. Mail clients communicate with email servers when downloading and downloading emails after they are installed on the computer. Part of the behind-the-scenes action is part of the overwhelming process of sending and receiving emails when using clients on a user’s computer, while commands are executed directly on the server when using webmiles. Many e-mail services allow users to use web clients, but making configurations for using software at this stage is a bit confusing, so we will continue to outline a number of key concepts for email protocols.
If you register to use Google’s Gmail service, you can receive and send your emails using this service. Google Webmill provides all the necessary features. Gmail includes two main sections, which include the visible user interface and email server used behind the scanner to send and receive emails. Using the graphical interface, you can communicate with the server behind the screen. So, with each click, we enter the address and type our text for the server, which we are trying to send to what kind of contact.
Sometimes using an email client or email management software is much easier than using webmiles. Among the popular free-to-do clients that use the good interface, you can name Mozilla Thunderbird. Using an email client means that instead of using the service user interface or the webmail, an email client is used to communicate with the server. In fact, when using a client, the user’s email only uses an email server. Many e-mail services allow the use of email clients to allow users to use their email service according to their needs. But one of the confusing things that involved many email users when setting up the email client is email protocols that each have a specific purpose. We will continue to explain each one.
POP3, Post Office Protocol
POP or Post Office Protocol is a protocol that was created 20 years ago and when the Internet did not have the shape today. In the 1980s, bandwidth was not widely used today, and users were only able to access servers to a limited extent, which made the POP protocols specialist. By using this protocol, emails are downloaded to the user’s computer on the server and the original instances are deleted from the server. The first version of the POP protocol was created in 1984, and the second version of the protocol was also released in 1985 under the title POP3.
POP3 is the current version used by this protocol, which continues to be used as one of the most popular protocols. Given that the protocol removes the original email from the server and copies the emails to the user’s computer, you can not access emails through Webmiles and clients on other computers.
Given the fact that POP3 technology has been in use for many years, this technology can not be considered as the latest technology advancement. POP4 technology is also introduced and can be used in the coming years with its development. Of course, this technology has not made much progress in recent years.
IMAP, Internet Message Access Protocol
The IMAP protocol was created in 1986, but the features of this standard are more consistent with POP3 than today’s modern world standards. IMAP does not limit users to an email client, and can use this protocol to use their emails in several different ways.
Compared to POP3, you can use IMAP and with mobile apps and applications to use an email account without problems with different gadgets, because using IMAP, emails are not logged on to the server until they are deleted by the user. Email remain. With this feature, IMAP protocol should be the most popular protocol used by users.
One of the things that may be called IMAP protocol weaknesses in some cases is to check out the space available in the account for storing emails. Of course, today, it can not be taken very seriously because services such as Gmail provide a lot of space to users and can not be used in the usual use of all the space available. In case of such a problem, the backup service can save the received email through the client installed on the computer and delete all the contents of the email.
Microsoft Exchange, MAPI, and Exchange ActiveSync
Microsoft introduced the MAPI protocol, the Messaging API shortly after the introduction of POP and IMAP protocols. Microsoft has provided the service with more than just sending and receiving emails to users. Simply put, MAPI is a protocol for connecting to Microsoft’s Exchange server, with its work structure similar to IMAP and can be used to synchronize emails, contacts, calendars, and other features. The method used to synchronize emails by Microsoft is known as Exchange ActiveSync.
Given that the Exchange and MAPI protocols developed by Microsoft, only companies that have their own Exchange Mailbox can use this protocol. Of course, Hotmail mail service users can also use this protocol. Many of the clients, including Android and iOS operating systems, can predict this protocol.
There are other protocols for sending and receiving emails, but since most users of e-mail services are known to support these three protocols, we are talking about the differences and capabilities of the three email protocols.