POP3 vs. IMAP (Part 1)
A few people have recently asked what the difference is between a POP3 mail account and an IMAP account. I knew how to explain it using technical terms like “protocols” and “mail clients”, but most people’s eyes glaze over when I break out the geek-speak, so let’s give this a go in regular old English.
What is POP3?
With POP3, when somebody sends you an email, it gets saved on Enertiahost’s server until you check your mail with Outlook (or whatever mail program you use…they all pretty much do the same thing). When Outlook says “hello” to our server, all your mail is transferred to your computer and deleted from the server. There’s an exception to that rule, which I’ll explain in a minute*, but in a nutshell this is how POP3 works.
What is IMAP?
With IMAP, your email gets stored on the Enertiahost mail server. Outlook simply acts as a viewer/editor. You can reply, forward, etc., but none of that is happening on your laptop. It’s all happening on the mail server
When you create folders or mailboxes with IMAP, they are created on the server. You simply see a copy or an “image” of them on your computer.
Benefits of POP3
Once your mail is downloaded to your computer, you do not need to actually be connected to the Internet to read your email. This might be handy for somebody who spends a lot of time on airplanes. Because your mail is stored on your computer and not our server, you’ll have no concerns about going over your disk usage quota and incurring additional storage charges.
*Here’s the exception I mentioned ealier…make sure Outlook is set to delete messages from the server after downloading them. This is the default setting, so you probably won’t need to change it. However, if you have it set to leave a copy on the server, your messages will stay there until you use Webmail or an IMAP client to delete them.
Benefits of IMAP
Because your email stays on the server, you can access your mail from multiple locations and/or devices at the same time. This is great if you have a smart phone and a desktop computer, and you want to keep your mail current and available to both.
Also, if your computer crashes you don’t have to worry about losing your archived mail. If you have a reasonably quick internet connection, IMAP is generally faster and more reliable.
If you have a GMail account, you’re already using IMAP. It’s great for users who have computers and a smart phone that they want to keep synced up.
Coming up next, POP3 vs. IMAP (Part 2). I’ll take a look at some of the downsides of both types of accounts, and discuss what you’ll need to do if you want to convert from POP3 to IMAP.
- Iain