Email Protocol

Email Protocol

1. Simple Mail Transfer Protocol

   • The internet standard used for sending messages across IP networks in server-toserver transfers. Also used by email users to send a message to an email server.

2. Post Offi ce Protocol 3

   • Used to retrieve emails from an email server over a TCP/IP connection. This is the most widely used email retrieval protocol. Normally users download emails to their local computer using POP3, deleting them from the email server.
   • Advantages
     • Can download emails to look at them when not connected to internet
     • Never run out of space on email server
   • Disadvantages
     • Can't open it on more than one device at a time

3. Internet Message Access Protocol

   • This is the other popular email retrieval protocol. Normally users work on the emails as they reside on the email server using IMAP and do not download them.
   • Advantages
     • Can be implemented on many devices at once
   • Disadvantages
     • You will eventually run out of space your email server so have to delete emails
     • Only used with internet connection, can't download emails to look at them offline