Mailgun customers often route multiple domains and regions. Bob sends through your configured domain and API key—so receipts, confirmations, and template messages inherit the same DNS reputation work you’ve already done.
Important: You’ll provide api_key and domain in tenant credentials. Validation endpoints may require specific Mailgun plans; we degrade gracefully when unavailable.
Teams standardized on Mailgun who want the same governed conversational layer as SendGrid users—without switching ESPs.