[Unit]
# this unit is configured to start and stop whenever openvpn-client@mail.service
# does
Description=Routing for email vpn
After=network.target
BindsTo=openvpn-client@mail.service
After=openvpn-client@mail.service

[Service]
Type=oneshot
ExecStart=/a/bin/distro-setup/mail-route start
ExecStop=/a/bin/distro-setup/mail-route stop
RemainAfterExit=yes

[Install]
RequiredBy=openvpn-client@mail.service