Operating

ScaiLine signs mail where your mail already flows. Pick the page for your platform:

• Postfix and the milter: grommunio, Mailcow or your own Postfix. The message never leaves your server.
• Microsoft 365: Exchange Online sends outgoing mail through the hosted ScaiLine relay and receives it back signed. Currently in preview.

Whatever the platform, two rules hold: ScaiLine never holds up mail (when in doubt, a message goes out without a signature), and you can always switch it off with one change on your side.