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E-Mail Protocols


SMTP - Simple mail Transfer Protocol

 This protocol is used to send emails.

The Ports used by this protocol are
25,465,587














IMAP/POP 3

 These protocols are used for retrieving emails from an Email Server.

POP 3 - Post Office Protocol 3

 The POP 3 will download the email to our device from a mail server.

It will only downloads the inbox folder & won't download or synchronize with other folders.

Also, once the email is downloaded same will be deleted from the mail server.so , there's no any other copies available.

IMAP  - Internet Message Access Protocol

 This protocol allows us to view our emails using multiple devices.

IMAP caches local copies of the email onto all of our device & synchronizes all the email folders.

But, when an email is deleted from a device, same will be deleted in all the other devices.



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