HTTP vs. POP vs. IMAP vs. Exchange
HTTP
- Web-based email
- Not made for access other than the web
- Some HTTP accounts can be checked given the right client tool (like Outlook can check Hotmail)
POP
- Not made for keeping multiple computers/devices and web in sync
- Generally, mail is downloaded from the server upon checking it (unless you use a tool like Outlook which has the ability to leave it on the server)
- Even if you leave messages on the server, if you delete on remote device, it will not delete on the server (unless you have a client tool like Outlook which will give you some options)
- If you send from remote device, it is not pushed to a sent items folders on the server
- Only brings messages down in the Inbox (not sub-folders)
- No good push capability for mobile devices (as of this writing)
- POP is low cost
- Most personal email accounts use POP (i.e. Gmail)
IMAP
- Keeps multiple computers/devices and web in sync
- Mail is left on the server when checked
- Inbox and sub-folders are brought down to client machine/device
- Push mail available on mobile devices, but many complain of poor support
- Newer than POP
- Catching on among personal users who do not have Exchange
Exchange
- The most robust email platform
- Mail is kept on the server
- Allows calendar, tasks, notes, etc. in addition to email
- Allows group collaboration of calendars, etc. when used in a group environment
- Excellent about keeping everything (PCs/mobile devices/web) in sync
- Push email for mobile devices (Blackberry and non-Blackberry with Exchange ActiveSync)
- Pretty much the standard for medium size and enterprise email/collaboration
- Expensive
- Gaining popularity among small businesses and personal users as it becomes more affordable
…maybe, one day, I’ll turn this into a more complete chart of features to allow for generic comparison. But I will note, that there is a different connotation, a different aura that doesn’t fit into a particular feature list about each of these. For now, I will suggest that you should use Exchange since you are a blog reader of mine and are therefore technically-savvy, business-savvy, and/or someone who copies what I do since I know what I’m doing.
