File msmtpd-interface@.service of Package msmtp

[Unit]
Description=msmtp daemon (MTA) for interface %i
Documentation=man:msmtp(1)
After=firewalld.service network.target

[Service]
ExecStart=msmtpd --log=syslog --interface=%i
NoNewPrivileges=true
ProtectSystem=strict
ProtectHome=true
PrivateTmp=true
PrivateDevices=true
ProtectKernelTunables=true
RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6
MemoryDenyWriteExecute=true

[Install]
WantedBy=multi-user.target