vimoMail is a POP3 and IMAP client for Java J2ME MIDP 2.0 enabled phones like Nokia S60, Sony Ericsson and Motorola.

Features:
IMAP, POP3 and SMTP Support.
Predefined settings for Gmail, Yahoo or AOL email accounts
Supports SMTP authentication and SSL
Supports IMAP folders

This is a “nagware” meaning you can use the application for as long as you like if you can bear the Nag screen