Definition – POP3 full form for “Post Office Protocol 3“. Post Office Protocol (POP3) is a simple type of internet protocol that is used in the computer network to access all e-mails from the mail server side by User terminal machine.
POP protocol is used inside the software layer protocol, and it grants quality potential to fetch and get hold of all electronic mail by using users.
POP (Post Office Protocol) has two variations first is POP2 and other brand new is POP3. POP2 is wanted SMTP (Simple Mail Transfer Protocol) to push emails, but POP3 do now not require the SMTP protocol.
POP3 way (Post Office Protocol version 3), and it is incorporated into well-known electronic mail softwares, like as Eudora and Outlook Express.
POP protocol Uses kinds of PORT
PORT 110 – Mostly e-mail users use the default TCP PORT one hundred ten that is linked to POP3 server, however it may’t help encrypted conversation.
PORT 995 – If customers want to establish reference to securely, then they are able to use the Transport Layer Security (TLS) or Secure Sockets Layer (SSL) on TCP port 995.
History of Post Office Protocol
Internet Engineering Task Force advanced first version of POP (Post Office Protocol), in 1984 as RFC 918. But back quit developers tried to make layout simple and effecting strategies to get admission to all emails from server machine. Due to efforts of developer group, entire emails can be read after discontinue from server, and personal area network.
• Post Office Protocol model 2 turned into designed, in 1985 as RFC 937.
• Post Office Protocol model 3 was developed, in 1988 as RFC 1081 and POP3 turned into up to date various times in later 10 years, after which ultimately it was released with modern specification in 1996 as RFC 1939.
Working of Post Office Protocol
If, customers try to test all lately emails then they'll establish connection with POP3 server facet. User sends the username and password to server machine for buying the proper authentication. After getting connection, customers can acquire all textual content primarily based emails and save them on their nearby terminal (device), then eventually discard all server copies and ruin the relationship from server device, and ring topology diagram as well.
Advantages of POP3
Post office protocol three has few benefits, underneath explain each one –
• No want more server storage space for storing electronic mail on server gadget, due to the fact emails are saved at the neighbourhood terminal.
• No want net connection every time for studying emails because all emails can be study offline.
• Need simplest less garage space for storing emails on the tough disk.
• Attachment files are opened speedy, because of already documents downloaded.
• Easy to apply
• Simple ways to configure
Disadvantages of POP3
POP3 has a few limitations for accessing e-mail from server facet, which includes –
• Other device has now not permission to get right of entry to all emails.
• It is difficult project to switch local mail folders to other e mail patron terminal factor.
• User’s device can get virus without problems, because of virus inflamed attachment document with email.
• Entirely email folder can discard straight away without intermission.
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