Of course, I got IMAP email working with Zimbra fairly easily. To my delight, though, I got Thunderbird syncing with the Zimbra server’s calendar feature! Here’s how it works:
After installing Thunderbird’s Lightning calendar plugin, click “Calendars” in the bottom of the left pane. Click “New..” to create a new calendar source.
Zimbra uses the iCalendar format, so select that. Then provide the following URL:
…where yourservername and username are your appropriate Zimbra settings (duh).
Voila! Now my appointments appear right in Thunderbird, and I can create appointments in Thunderbird which appear in Zimbra’s calendar! w00t!
I haven’t tried other functionality, such as clicking on an emailed invitation to add an appointment, but this is farther than I expected to get. I’m sure the rest will follow. Next step is to add Google Calendar support, but that has been well-covered elsewhere.
It sure is cool when you can whip your open-source apps into doing exactly what you want.