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Email Protocols – POP3, SMTP and IMAP
In this article we are going to see the detailed information about what is POP3 and the default ports for them. This will also explain the most commonly used Email protocols on the internet – POP3, IMAP and SMTP.
What is POP3?
Post Office Protocol version 3(POP3) is the standard mail protocol through which user can receive emails from an remote server to an local email client. you’ll be able to download emails on your native computer and might browse them offline using POP3. POP3 can store your mails locally and delete them from the server once it’s downloaded. However, you get a check mark the choice “Leave a copy on server”, a duplicate of email remains on server and you’ll be able to configure the pop account on another machine.
Otherwise, POP3 by default deletes the mails from the server, and helps to scale back the space that your email account uses on your web server. If you would like to manage your mails across completely different locations POP3 protocol assumes that your email is being accessed solely from one application and should not be an ideal option.
Default POP3 Ports
POP3 protocol works on 2 ports:
Port 110– Default POP3 non-encrypted port
Port 995– Using POP3 securely this port is used to connect
What is IMAP?
For accessing email on the remote web server from native client there is an alternative protocol known as Internet Message Access Protocol (IMAP) . IMAP are often thought of as an remote file server. It offers the user additional capabilities by retaining email on the server and organizing it in folders. IMAP permits simultaneous access by multiple clients. So, it’s quite appropriate for you if you’re attending to access your email from completely different devices & location.
Default IMAP Ports
IMAP protocol works on two ports:
Port 143– Default IMAP non-encrypted port
Port 993– Used to connect IMAP securely
The most common Internet mail protocols used for retrieving emails are IMAP and POP3 and are supported by all modern email clients and web servers
What is SMTP?
Simple Mail Transfer Protocol (SMTP) is the standard protocol that uses the “Store & Forward” process for transferring e-mail across the Internet .
Default SMTP Ports
The SMTP protocol works on three ports:
Port 25 – Default SMTP non-encrypted port
Port 26 – Opened on all servers
Port 465 – Using SMTP this port is used to send messages securely