Mbox Viewer

Mbox Viewer is a GTK4 desktop application for reading and searching .mbox
archives.

An .mbox file concatenates every message in a mailbox into one long text
file. Mbox Viewer imports an archive once into a local SQLite database with a
full-text search index, so that messages become individually addressable and
searching across subjects, addresses and message bodies is effectively
instant, even for large archives.

Features:
* Import a single .mbox file, or a folder of them (re-importing is cheap)
* Full-text search over subject, From/To/Cc and bodies (SQLite FTS5)
* Chunked, sortable message browsing
* HTML message rendering via WebKit (plain-text fallback)
* Inline image gallery, plus attachment save/open
* One-click database reset