8 days
- You can use imapsync to sync all you mails from GMail to your new email provider if you still use email.
- If you no longer use email, Piler is a bit heavy but well-working solution.
- Notmuch is much lightweight but has no web UI, but if it require you install a (may be TUI) software, why not just install a mail client like Thunderbird and then just use its local mail feature to index the mbox?