There are two major ways of accessing email:
- IMAP - email that is deleted from one device, is not downloaded to the other devices.
- POP3 - all email is downloaded to all devices regardless of being deleted on one device or another.
IMAP is not supported by all email providers, nor on all email devices and email programs. You need to do your homework and search your email providers website to see if the IMAP settings for your email program (Outlook, Apple Mail, etc.) or email device, (iPhone, iPad, etc.) are supported.
Here is a list of common email providers and whether they support IMAP or not:
BellSouth IMAP is not well documented, but I have implemented IMAP
Gmail IMAP supported and documented on Gmail website
ATT IMAP supported and documented on ATT website
Comcast IMAP support is not documented
AOL IMAP supported and documented on AOL webiste
Downsides to IMAP:
- Synchronizing IMAP folders using Outlook can be slow. You may need to shutdown and restart Outlook occasionally to get this to work.
- Outlook will not show one integrated view of all your email accounts. Each IMAP account will have a separate inbox and user created folders. Your POP3 email accounts will share one IBOX and the same set of user created folders. This can make finding an email difficult if you are not consistant on how you file emails.
- Make a mistake and delete a message that you want, that message is gone and cannot be retrieved. The POP3 protocol is much more forgiving. If you delete a message and empty your wastebasket, that message is probably available via webmail.
- IMAP may not be supported on all your email devices. Unless all your email devices support IMAP, it may not make sense to implement it.
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