Install this version:
emerge -a =acct-group/davmail-0
If this version is masked, you can unmask it using the autounmask tool or standard emerge options:
autounmask =acct-group/davmail-0
Or alternatively:
emerge --autounmask-write -a =acct-group/davmail-0
# Copyright 2019 Gentoo Authors # Distributed under the terms of the GNU General Public License v2 EAPI=7 inherit acct-group DESCRIPTION="group for davmail server" ACCT_GROUP_ID=-1 KEYWORDS="~amd64 ~x86"