MailChannels
Application delivery with API authentication, Domain Lockdown, sender isolation, and signed feedback. These guides cover the Email API, not an obsolete anonymous Workers relay.
Start with the first guide, then choose a sending, receiving, or feedback task. Each walkthrough identifies permissions, operational checks, and the boundary between the service and MailKite. Refer to the official MailChannels documentation for current platform requirements.
Explore the guides
Authorize a MailChannels domain with Domain Lockdown
Prepare the MailChannels API key, Domain Lockdown record, and authentication DNS without copying obsolete anonymous-relay examples.
Send application email with the MailChannels SDK
Use the current authenticated MailChannels client with Domain Lockdown and inspect its data/error result.
Enroll and verify MailChannels delivery webhooks
Register a delivery-event endpoint using the MailChannels SDK and authenticate callbacks before persisting recipient outcomes.