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