What is POP3/IMAP ??? Advantages & Disadvantages..
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    What is POP3/IMAP ???

     

    Imap and POP3 are the two important protocol which is use generally used for email services below you can find out the detailed information of Imap and POP3 with their Advantages and Disadvantages.

     

     

    IMAP (Internet Message Access Protocol) : It was created in 1986, but seems to suit the modern day world of omnipresent, always-on internet connectivity quite well. The idea was keep users from having to be tied to a single email client, giving them the ability to read their emails as if they were “in the cloud.”

    Compared to POP3 (Post Office Protocol), IMAP allows users to log into many different email clients or webmail interfaces and view the same emails, because the emails are kept on remote email servers until the user deletes them. In a world where we now check our email on web interfaces, email clients, and on mobile phones, IMAP has become extremely popular. It isn’t without its problems, though.

    Because IMAP stores emails on a remote mail server, you’ll have a limited mailbox size depending on the settings provided by the email service. If you have huge numbers of emails you want to keep, you could run into problems sending and receiving mail when your box is full. Some users sidestep this problem by making local archived copies of emails using their email client, and then deleting them from the remote server.

     

    There are some interesting advantages to IMAP:

    * You can keep a local archive, as well as rest assured knowing a copy is stored on the mail server.
    * With a persistent Internet connection, only email headers are downloaded, so you can see your mail faster. The full message is only downloaded when you request to read it.
    * Size of your message archive is limited only by your account’s server space, not your personal device(s).

     

    Disadvantages :

    Mail is not usually available if you are offline.

     

     

    POP3 (Post Office Protocol) :POP stands for “Post Office Protocol”. It works very simply. When the POP e-mail server receives e-mail it stores it on the server until you to request it. By simply opening your email program (e.g., Outlook) you request the e-mail from the server by pressing the “Send” or “Receive” button. The e-mail program in essence asks the server if there is any mail waiting. If there is, it tells the server to send it to you. POP3 downloads all mail from the server from the inbox and stores it on your computer. The emails are removed from the server and only stored locally in your mail client program. Emails are available when you're not connected to the internet.

    When the POP server receives your request for mail, it sends the entire message to your e-mail program. Once you receive the email, the message is no longer stored on the server unless you specifically tell it to keep a copy.

     

    The advantages are:

    * A local copy of your email.
    * Very little remote server storage space overhead required (if emails are deleted from the server as they are retrieved).
    * Consolidation of many email accounts and servers to deliver to one inbox.

    Traditionally, this is how most personal email systems were set up. For one, online storage used to be comparatively very expensive, so it made a lot of sense to clear email off the server once it was downloaded elsewhere.

    However, POP is not without its limitations. The disadvantages are:

    * No remote copy (if emails are deleted from the server as they are retrieved)
    * No remote web access or synchronization between several programs or devices.
    * All mail is stored in one (and only one) place.
    * Local copies of messages still requires disk space to store messages.
    * Local copies of messages are vulnerable to data loss or security threats.

     

    Disadvantages :

    • Can be much slower to check mail
    • Much harder to do server-side filtering
    • Mail is inaccessible from other machines

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