SMTP

SMTP server that captures emails and applies accept/reject rules.

protocols:
  smtp:
    enabled: true
    port: 2525
    domain: mockly.local
    rules:
      - id: reject-spam
        from: "*@spam.example.com"
        action: reject
        message: "550 spam not accepted"
      - id: accept-all
        action: accept

Captured emails are visible at GET /api/emails.

See also

• Configuration — matching, templated responses, state conditions, and scenarios shared by every protocol
• Fault Injection — this protocol's fault fields: code, message, delay, error_rate
• Management API — list/clear captured emails