Install this version:
emerge -a =kde-apps/kmbox-26.04.0
If this version is masked, you can unmask it using the autounmask tool or standard emerge options:
autounmask =kde-apps/kmbox-26.04.0
Or alternatively:
emerge --autounmask-write -a =kde-apps/kmbox-26.04.0
# Copyright 1999-2026 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
ECM_QTHELP="false" # TODO: Port to ECMGenerateQDoc
ECM_TEST="true"
KFMIN=6.22.0
PVCUT=$(ver_cut 1-3)
inherit ecm gear.kde.org
DESCRIPTION="Library for accessing MBox format mail storages"
LICENSE="GPL-2+"
SLOT="6/$(ver_cut 1-2)"
KEYWORDS="~amd64 ~arm64"
IUSE=""
DEPEND=">=kde-apps/kmime-${PVCUT}:6="
RDEPEND="${DEPEND}"
>=kde-apps/kmime-$(ver_cut:6=
>=kde-apps/kmime-$(ver_cut:6=