Geary[1] is one option for Linux users. It stores all messages in a giant sqlite database and models labels by "tags". It's still defintely wip though. I do re

Geary[1] is one option for Linux users. It stores all messages in a giant sqlite database and models labels by "tags". It's still defintely wip though. I do recall reading somewhere that these days Thunderbird does deduplicate messages with multiple labels, but I haven't tested whether it is indeed true. [1] https://gitlab.gnome.org/GNOME/geary/-/issues https://gitlab.gnome.org/GNOME/geary/-/issues