A few days back, I was helping my wife set up AOL email on her new laptop. We decided on using Windows Live Mail, the default mail program on the Windows 7 operating system. When configuring the email settings manually, I asked which email protocol she would prefer. After a brief moment of complete silence, she rolls up her eyes and says,
Do you think I know or would like to know the difference between POP3 and IMAP?
Well, though my better half might not be interested, I’m sure many of you would be intrigued. Here is a non-technical explanation of the differences between POP3 (Post Office Protocol) and IMAP – two very popular email protocols. But before, that let’s touch upon some basics.
I hope you now understand that your email box resides on a server and NOT your computer. The messages can be downloaded to your local system using email programs like Outlook Express.
POP3 and IMAP are email protocols and help an email program connect to the server that has your mailbox. For this the account has to be first added in the chosen email program. This is not as difficult as it sounds because most programs offer a ‘set up wizard’ that will walk you through the steps.
Though both allow you to download message to the computer, the main difference between POP3 and IMAP lies in message synchronization or the lack of it.
If the POP3 protocol is used to set up the account, messages will typically be downloaded and removed from the server. Having said that, most email programs do allow you to leave a copy of the message on the server. However, problems start when you use two or more computers / devices to access the same email account. In such a scenario, even though each machine can have the same set of emails in the Inbox, the “Sent” and “Drafts” folders will not be in tune. Thus, messages sent from one computer will only be available on that machine. The same goes for email you’ve saved as drafts.
Such issues don’t arise with IMAP. This protocol synchronizes the online email account with all computers and devices (email on cell phone) that access it. Thus, you’ll have the exact same set of email messages on all machines. There is a downside to IMAP too. If you delete a message from one machine, it will be removed from all the others and the online server.
This depends entirely on how you plan to maintain and use the email account. If you want to keep a copy of the message on the online server, use POP3. However, those obsessed with organization should move on the IMAP path.
Take the example of the AOL email service which lets you access the account through both POP3 and IMAP – yes, for free! AOL also offers unlimited storage space. Will it be a good idea to let a copy of the message lie on the server because space is not longer a constraint? Or would you rather prefer maintaining the same set on your computer and the AOL email account you’ve set up on the iPhone?
It’s your call… sorry, I can’t decide for you!
During development, Netscape Navigator browser was known as Mozilla. It stood for "Mosaic-Killer". That's because Netscape was being developed by the creators of NCSA Mosaic, the browser that popularised the web. NCSA (National Center for Supercomputing Applications) considered Mosaic their property and didn't appreciate the idea of the original programmers leaving their organisation to join/found a company. Jim Clark, co-founder of Netscape Communications and the main force behind it, made it clear to everyone that Netscape Navigator is to be developed from scratch and not a single line of Mosaic's code is to be used. The Mozilla name has now been taken up by the open source successor of the company. The irony is that Netscape was intended to be free only for non-commercial, academic and non-profit organisations. [more...]