Is there a free online mailbox you can sync with Thunderbird to give the same email functionality as Exchange Server/Outlook setup? Main requirements would be: - Delete email from mailbox when deleted from client - Option to download all emails and folders to client - When a folder is created on client and emails moved to it this will be reflected in the mailbox - Contact list and Calendar updated from client to mailbox and vice verse
Gmail, Thunderbird and Google IMAP service. It's not expensive for businesses that's all I know. You can get contact list and client sync plug-ins too.
There is something that fully duplicates Outlook's functionality w/ calendar and contact syncing. Can't remember the name off the top of my head, but it came up on Slashdot fairly recently. May want to do a bit of browsing over there.