Can Exchange ActiveSync download POP3 or IMAP4 messages?
The Exchange ActiveSync protocol is used only for Exchange Server mailbox data. However, all Windows Mobile powered devices and many other Exchange ActiveSync compatible devices can download messages from a POP3 or IMAP4 server or a Hotmail account. These messages will not be combined with the Exchange ActiveSync messages on the device or on the server. You can configure multiple POP3, IMAP4, or Hotmail accounts on all Window Mobile powered devices.