What is POP3 (Post Office Protocol)? If you use e-mail, I’m sure you’ve heard someone talk about “POP access” or been asked to configure a “POP server” in your email client. Simply put, POP3 (Post Office Protocol) is used to receive e-mail from a mail server.
What is POP?
Post Office Protocol (POP3) is an Internet standard protocol used by local email software clients to receive email from remote mail servers over a TCP/IP connection. Most e-mail applications use POP3 (Post Office Protocol), of which there are two versions:
POP2 was a standard in the mid-1980s that required SMTP to send messages.
POP3 is a newer version that can be used with or without SMTP. Through POP3, e-mail can be downloaded from the server’s inbox to your computer. In addition, your email is available to you even when you are not connected to the server.
It is important that IMAP (IMAP – Internet Message Access Protocol), is able to access traditional email better and completely remote.
In the past, fewer Internet service providers (ISPs) supported IMAP because it required larger storage devices on the ISP hardware. Today e-mail clients support IMAP along with POP.
purpose of post office protocol
When someone sends you an email it usually cannot be delivered directly to your computer. The message needs to be stored somewhere. This is such a place from where you can easily pick it up. Your ISP (Internet Service Provider) is online 24 hours a day, seven days a week. It keeps receiving messages for you as long as you download it. Post Office Protocol allows you to do the following:
1. Can receive mail from an ISP and delete it on the server.
2. Can receive mail from an ISP and leave it on the server.
3. If a new email has arrived, you can get the information.
Comparison with IMAP
Internet Message Access Protocol (IMAP) is a newer and alternative mailbox access protocol. Some of the main differences between Post Office Protocol and IMAP can be summed up as follows:
1. POP is a simple protocol, which makes it easy to implement.
2. Post Office Protocol moves messages from the email server to the local computer, although there is usually an option to leave messages on the email server.
3. IMAP works primarily to leave messages on the email server, rather than simply download a local copy.
4. POP treats a mailbox as a single store, and has no concept of folders.
5. When POP receives a message, it receives all parts of it, whereas the IMAP4 protocol allows clients to receive individual MIME parts separately – for example, plain text without receiving attached files. getting the text.
6. IMAP supports flags on the server to keep track of the status of email messages: for example, whether a message has been read, replied to, forwarded, or deleted.
How does Post Office Protocol (POP) work?
When a user checks for new email, the client will connect to the POP3 server. The email client then provides its user name and password to the server for authentication. Once connected, the client issues a series of text-based commands to retrieve all email messages. It then stores these downloaded messages as new email on the user’s local system, deletes the server copies, and disconnects from the server.
By default, they are deleted once the server emails are deleted. As a result, emails are tied to that particular machine and it will not be possible to access the same email from an email client on another machine. The user can get around this problem by configuring the email client settings to leave a copy of the email on the server.
POP frees up mailbox space on the server because email and attachments are downloaded and deleted on the server-end whenever email clients check for new mail. Offline email messages stored on the user’s computer have no mailbox size limits except for the hard drive storage capacity of the PC. One drawback of POP3 mail accounts is that it is difficult to export mail if the user decides to switch email programs or computer systems.
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Benefits of POP3
1. Emails are downloaded to the user’s computer. Messages can be read when the user is offline.
2. Opening attachments is quick and easy as they are already downloaded.
3. less server storage required; All emails are stored on the local machine.
4. Email storage capacity limited by the size of your hard disk.
5. Very popular, easy to configure and use.
Disadvantages of POP3
1. Email cannot be accessed from other machines (unless configured to do so).
2. Exporting a local mail folder to another email client or physical machine can be difficult.
3. Email folders can become corrupted, possibly losing entire mailboxes in one go.
4. Email attachments can contain viruses that can harm the user’s computer or laptop if they are opened locally and their virus scanners are unable to detect them.
Although POP3 has been around since the 1980s, it remains one of the most viable and popular email protocols. By storing mail on your computer, it allows you to read your messages offline and there is no size limit on server storage capacity. However, one should be wary of viruses in attachments as they can pose a significant security threat to your PC.
POP3 access means that e-mail is delivered to and stored on your personal computer, tablet or phone. When you check e-mail and download it to your computer, the e-mail is immediately deleted from the server. IMAP on the other hand saves all your e-mails on the server.