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Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun

Official registry Productivity

Letterkeel: send email from your own domain via SMTP, Resend, SendGrid, Mailgun, Postmark

Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http letterkeel-send-email-via-smtp-resend-se 'https://mcp.apify.com/?tools=cybermax/send-email&via=mcp-registry' --header 'Authorization: <Your Apify API token, as '\''Bearer <apify-api-token>'\''. Runs are billed per email recipient accepted to your Apify account.>'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "letterkeel-send-email-via-smtp-resend-se": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=cybermax/send-email&via=mcp-registry",
            "headers": {
                "Authorization": "<Your Apify API token, as 'Bearer <apify-api-token>'. Runs are billed per email recipient accepted to your Apify account.>"
            }
        }
    }
}

Frequently asked questions

What is Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun?

Letterkeel: send email from your own domain via SMTP, Resend, SendGrid, Mailgun, Postmark

How do I install Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun?

It runs as a remote server. In Claude Code: claude mcp add --transport http letterkeel-send-email-via-smtp-resend-se 'https://mcp.apify.com/?tools=cybermax/send-email&via=mcp-registry' --header 'Authorization: <Your Apify API token, as '\''Bearer <apify-api-token>'\''. Runs are billed per email recipient accepted to your Apify account.>'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun need an API key?

Yes. It expects Authorization, which you set in its configuration.

Who maintains Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun?

It is published by dev.workers.cybermax-tools.cybermax. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.