What is POP?

What is POP?

POP stands for Post Office Protocol. The POP protocol was published in the year 1984. POP has been updated two times namely “POP2” and “POP3”. The POP protocol is an Internet Standard Protocol that works on the application layer. It is used to get an access email from the mail server. The need for POP mainly arises when the user or client does not have a continuous internet connection and what’s to receive email messages. The Pop client makes use of POP to pull email messages from the POP server. POP3 is the updated version of POP....

What is POP3?

POP 3 stands for Post Office Protocol Version 3. POP3 protocol is used to provide access to the mail inbox that is stored in the email server. POP3 protocol can download and delete messages. Once the POP3 client has established a connection with the mail server it can easily retrieve all the messages from the server. The user can access the messages locally even if the user is offline. Every time the client needs to check manually for new messages as POP3 Protocol provides the feature of real-time synchronization. Various email applications such as Microsoft Outlook, Apple Mail, Gmail supports POP3 protocol....

History of POP3

In 1984, the Internet Engineering Task Force published RFC 918, the initial version of post office protocol. The POP3 protocol was created by the engineers as a straightforward and efficient email protocol that is used to retrieve emails from the server. Instead of accessing the mailbox offline, this offers the option to access the mails offline....

Working of POP3

Initially, POP3 needs to establish a connection between the POP client and the POP server. Once a secure connection is established several commands are exchanged between them to perform the task. Once a connection is established client requests available email messages. The Server sends the available messages along with their size and unique identifier number. Once the client receives the message, it makes a request to the server for downloading the messages. The user marks such messages and sends them to the server. Upon receiving from the client-server sends the messages selected by the client and accordingly marks them as read or unread. The client if want sends a request for deleting the messages. Once the tasks are completed the client sends a close connection request to the server The server then sends an acknowledgment to the client and closes the connection....

Advantages of POP3

The message can be read offline also. POP3 requires less storage space. POP3 is easy to use and configure. POP3 is supported by many email applications. Since our PC already has the emails stored there, accessing them is quick and simple. The size of emails we send and receive is unrestricted. Since all emails are kept locally, less server storage space is needed....

Disadvantages of POP3

POP3 does not provide the feature of real-time synchronization. If an email consists of virus attachments it can affect the system easily. POP3 does not support accessing the same email at the same time on different systems. At a time entire email folder can be discarded. It is also possible for the email folder that is downloaded from the mail server to get corrupted. Since the emails are kept locally, anyone using your computer can access the email folder....

Difference Between POP3 and IMAP

POP3 IMAP POP is a simple protocol that only allows downloading messages from your Inbox to your local computer. IMAP (Internet Message Access Protocol) is much more advanced and allows the user to see all the folders on the mail server. The POP server listens on port 110, and the POP with SSL secure(POP3DS) server listens on port 995 The IMAP server listens on port 143, and the IMAP with SSL secure(IMAPDS) server listens on port 993. In POP3 the mail can only be accessed from a single device at a time. Messages can be accessed across multiple devices To read the mail it has to be downloaded on the local system. The mail content can be read partially before downloading The user can not create, delete or rename email on the mail server. The user can create, delete or rename an email on the mail server....

Frequently Asked Question on POP3 – FAQs

From IMAP and POP3 protocol which provides more security?...