In the world of email, the two most common protocols are POP3 and IMAP, while both are very useful tools for solving a piece of the email puzzle, they are not very effective as the foundation for your solution.
If you find yourself deleting and organizing the same emails on each of your computers or devices separately, OR you can no longer access an email from a second computer once it is downloaded on the first, you are probably using POP3.
If you have an exact match of your emails & email folders on multiple computers and devices but calendars and contacts do not sync you are most likely using IMAP. Read more…