Lucide icons (https://lucide.dev), ISC License, see LUCIDE-LICENSE.txt.
QMail draws its UI icons from Lucide path data generated into
vendor/gui-3/src/render/icon_paths.h by tools/gen_icons.py (T3 / M9.1b).
Source: lucide-react 0.552.0 (dist/esm/icons/<name>.js icon nodes, the
same artwork as lucide-static icons/<name>.svg), read on 2026-09-23.
The icons used are the QGUI_ICON_ rows of vendor/gui-3/src/layout/icons.h.
No font is embedded; the earlier subset icon font (lucide-static) is gone.
