[Unit]
Description=SMTP Proxy Service
After=network.target

[Service]
Type=simple
User=mattia
Group=mattia
WorkingDirectory=/path/to/smtpproxy
ExecStart=/path/to/smtpproxy/venv/bin/python /path/to/smtpproxy/proxy.py
Restart=always
Environment=PATH=/path/to/smtpproxy/venv/bin:/usr/bin:/bin
Environment=VIRTUAL_ENV=/path/to/smtpproxy/venv
StandardOutput=journal
StandardError=journal

[Install]
WantedBy=multi-user.target