Why Default Mail App Resets to Outlook on Windows 11
Quick fix: Open Settings → Apps → Default apps, search your preferred mail app (Thunderbird, Mailbird, Gmail-via-browser). Click the result. For each protocol (mailto, MAPI) and file type (.eml), click the current default and set to your app. You set Thunderbird as the default mail app. After a Windows feature update or new Outlook (the … Read more