smeserver-qpsmtpd/root/usr/lib/systemd/system/qpsmtpd.service

[Unit]
Description=qpsmtpd
After=network.target network-online.target

[Service]
Type=simple
LimitDATA=150000000
LimitSTACK=150000000
LimitMEMLOCK=150000000
Environment=PORT=25 INSTANCES=40 INSTANCES_PER_IP=5 QPSMTPD_CONFIG=/var/service/qpsmtpd/config PATH=/var/qmail/bin:/bin:/usr/bin:/usr/local/bin TCPLOCALHOST=me
WorkingDirectory=/var/service/qpsmtpd/

ExecStartPre=/sbin/e-smith/service-status qpsmtpd
ExecStartPre=/sbin/e-smith/systemd/qpsmtpd-init %N
ExecStart=/usr/bin/qpsmtpd-forkserver \
        -u qpsmtpd \
        -l 0.0.0.0 \
        -p $PORT \
        -c $INSTANCES \
        -m $INSTANCES_PER_IP
ExecReload=/bin/kill -HUP $MAINPID
Restart=always
RestartSec=20s

[Install]
WantedBy=sme-server.target