How IMAP works under the hood

I've been looking to migrate from Exchange-Outlook, but there really aren't any options. There just isn't an open source solution to have an integrated email / tasks / events / contacts, with consistent labels across item types and reminders.

With Outlook, i can use a custom view to see every item in a category flagged for follow-up. I can also set a reminder on a contact, or drag an email or contact onto my calendar to create an event.

Thunderbird has it all. I don’t like the way thunderbird does it, but I like outlook even less… so thunderbird it is.