CalDAV and CardDAV are open, internet-based standards for syncing calendar and contact data across different devices and services. They’re built on WebDAV and the iCalendar/vCard formats, making them vendor-agnostic and suitable for both personal deployments and enterprise environments. What CalDAV Does CalDAV handles calendar synchronization—events, tasks, reminders, and availability data. Add an event on your…
Thunderbird’s built-in calendar support (Lightning) handles local calendars, but you need two extensions to sync with Exchange Online: TbSync — manages cloud account synchronization for contacts, calendars, and tasks Provider for Exchange ActiveSync — adds ActiveSync protocol support to TbSync Install both from Thunderbird’s Add-ons Manager: Open Thunderbird and go to Menu → Add-ons and…
Thunderbird’s default feature set is deliberately minimal. Addons fill critical gaps for users managing multiple accounts, large archives, or specific workflow requirements. Here are the addons that solve genuine problems. Organization and Maintenance Remove Duplicate Messages Mail folders accumulate duplicates from IMAP syncing glitches, accidental re-imports, or migrations across devices. Remove Duplicate Messages scans folders,…
If you’re using an iPhone set to English but living outside the US, you’ve probably noticed US holidays cluttering your Calendar app. This happens because iOS ties holiday calendars directly to your region setting — not your language preference. Why US Holidays Appear by Default The Calendar app automatically subscribes to holidays based on your…
Thunderbird’s default reply headers are minimal—just a simple line showing who sent what and when. If you need detailed formatted headers showing From, To, Cc, Subject, and Date for compliance, audits, or professional correspondence, you’ll need to add an extension or configure a template. ReplyWithHeader Extension ReplyWithHeader is the quickest solution. It replaces Thunderbird’s default…