Which should be the best PHP Webmail system to access my mail remotely to meet such requirements?
- Outlook Synchronization
- HTML email composing
- IMAP support, including IMAP over SSL
- Live Spell Check

Roundcube Webmail, AfterLogic WebMail, AtMail, SquirrelMail, Which one should be the exact one I am looking for?

Thx
Wallace