POP3 and IMAP4 accounts let you access your email that is stored on other email systems that support POP3 and IMAP4. Most email systems support this type of connection to download and view your email.
Using POP3 and IMAP4 Accounts in Online Mode
Using POP3 and IMAP4 Accounts in Remote and Caching Modes
Changing the Duration for POP3 and IMAP4 Server Timeouts
Using SSL to Connect to a POP3 or IMAP4 Server
Downloading Items from POP3 and IMAP4 Accounts
Sending POP3 and IMAP4 Mail from GroupWise
Deleting an Item from a POP3 or IMAP4 Account