# System Generated Emails
By default, system generated emails (password resets, user invites etc) are sent using Enhance's local SMTP server.
WARNING
For system generated emails to work you must:
- Ensure your server/provider allows port 25 outbound
- Set a valid reverse PTR
- Set a custom 'from address' in Settings > Branding
Custom SMTP details can be configured if you would like to use an external mail server.
To configure System generated emails:
- Open Settings in the left sidebar
- Select Platform
- Navigate to System emails
- Select Edit and input your details
- Click Save to finish