Replying to
@lehtimaeki@snapp.social it goes much deeper: they develop and maintain their own database! When the project started, there was no proper SQL DB available, so they created a full database themselves. The reason why search doesn't work well and the UI can only deliver what the structured data below offers. They work on a standard SQL DB. They call the project "Panorama – Global Message Database" and they update about the progress in their monthly development digest:
https://blog.thunderbird.net/2026/06/thunderbird-monthly-development-digest-june-2026/