Delete Thunderbird Search Index

Thunderbird search index can get corrupted causing bad search results. You can delete the search db which in turn causes thunderbird to reindex all the email. Follow the process below.

1. Quit Thunderbird
2. Locate your global-messages-db.sqlite file.
/Users//Library/Thunderbird/Profiles/
3. Rename (or delete) both global-messages-db.sqlite and global-messages-db.sqlite.journal
4. Start Thunderbird
5. Reindexing begins