
IMAP is a server-based e-mail technology that leaves all of your e-mail messages and
mailbox configurations entirely online. By taking this approach to e-mail and folder
storage, your entire e-mail box becomes completely portable - requiring no additional
configuration on additional computers beyond the basic Outlook setup. Because this
type of connection is entirely dependent on the server, increasing the complexity
of the common support call, fewer e-mail providers actually offer IMAP support.
By the same token, since your e-mail messages and mailbox configurations are entirely online
with IMAP, it's typically best for you to have a stable, high-speed connection to
reduce the likelihood that you receive errors while managing your e-mail.
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Note: Since IMAP leaves your e-mail messages online instead of downloading copies of your messages (like POP3), deleting the message in Outlook or in CertMail's WebMail interface deletes the message entirely. |
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In a practical sense, this type of setup offers one key benefit. Namely, folders
you create with IMAP are also created in your e-mail box on the server. Then, when
you set up another IMAP connection to the same mailbox from another computer, the
folder structure remains intact. If you're regularly moving from computer to computer
or simply need access to the same folder structure no matter where you access your
e-mail, IMAP is probably the best solution for you.
One final thing to consider, though, before accepting IMAP as your preferred e-mail
connection is the method you must use to delete e-mail when you use an IMAP connection.
Many computer users have become accustomed to the concept of selecting a bunch of
items they wish to delete and sending them to the Deleted Items folder, the e-mail
version of a Windows Recycle Bin. IMAP does not use the Deleted Items folder as
a temporary holding place for messages pending deletion. Instead, it simply places
a strike through the e-mail message to indicate that it has been deleted, and when
you're ready to purge it from your mailbox entirely, you have to indicate so with
your e-mail program.
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Note: In all of the various versions of Outlook, you can purge
your mailbox of IMAP deleted items by clicking Edit, Purge
Deleted Items from the menus. |
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In short, if you find yourself regularly accessing your e-mail from different computers,
have a high speed Internet connection, and are comfortable learning a slightly different
workflow for deleting messages, IMAP is your solution. Just mark the IMAP option above and select your preferred e-mail client for detailed instructions on configuring that program for CertMail and IMAP.

POP3 is a client-based technology that stores all of your e-mail messages
and folders on your local computer. Since all of your e-mail and folders reside
on your personal computer, all that's required with POP3 connections is a quick
connection to your mailbox on the part of your e-mail client to download any new
mail that's arrived. In order to maintain the portability of your e-mail, our POP3
configurations always leave a copy of your e-mail messages on the server until you
empty them from your Deleted Items folder. Unlike IMAP, this configuration does
not allow you to maintain the same folder structure if you set up your e-mail on
another computer, but it still allows you to download identical copies of your mail
messages on as many computers as you like.
In addition, since POP3 only requires you to connect to your mailbox for a short
period of time to download new messages, it's not nearly as important for you to
have a stable, high speed connection as it is with IMAP. If you use a dial-up or
satellite connection to the Internet, POP3 is definitely the best option for you.
But even if you have a high speed connection, you may still want to consider using
POP3 as your connection type. Since the main stream public only moved to high speed
Internet connections in the last several years, POP3 - with it's stability on weaker
Internet connections - has seen more widespread adoption amongst e-mail users and
has consequently become the more familiar approach to e-mail for most people.
In short, if you tend to use the same computer to manage your e-mail all the time
or have a slower, weaker Internet connection, POP3 is your best choice. And even
if you have a stable, high speed connection, POP3 may be the best solution for you
thanks to its greater overall stability and familiar methods for managing e-mail.
If you decide that POP3 is the best connection type for you, just mark the POP3 option above and select your preferred e-mail client for detailed instructions on configuring that program for CertMail and POP3.