Letterkeel: send email from your own domain via SMTP, Resend, SendGrid, Mailgun, Postmark
Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun is an MCP integration. Letterkeel: send email from your own domain via SMTP, Resend, SendGrid, Mailgun, Postmark.
The registry lists a streamable-http connection at https://mcp.apify.com?tools=cybermax/send-email. The endpoint declares these request headers: Authorization.
Check the maintainer’s instructions for account access, authentication and the supported client configuration. Once connected, inspect the tools your client receives and try a small task that matches the server’s stated purpose. The registry description does not include a verified, complete tool list.
View the publisher’s registry entry · Project repository · Project website. This profile uses version 1.0.1 from the registry. Registration identifies the publisher namespace; it does not establish that this is a first-party integration for every service it connects.
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