dev.mailkite/mailkite vs Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun
dev.mailkite/mailkite is an MCP server published by mailkite.dev. Marketplaces we read that list it: 1 (Official MCP Registry). Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun is an MCP server published by shawmena-dotcom. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-18. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |  dev.mailkite/mailkite |  Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun |
|---|---|---|
| Official MCP Registry | Listed Version: 0.13.0 Downloads/month (npm): 299 Downloads/week (npm): 73 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen |
Listed Version: 1.0.1 No figure published Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | dev.mailkite/mailkite | Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 0 | No figure on GitHub |
| Forks (GitHub) (differs) | 0 | No figure on GitHub |
| Last release | Not published | Not published |
| Where it runs (differs) | Remote server (mcp.mailkite.dev/mcp) | Remote server (mcp.apify.com) |
| Transport | Streamable HTTP | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | 1, secrets among them: 1 | Not published |
| Licence | Not stated | Not stated |
| Repository (differs) | github.com/mailkite/mailkite-mcp | github.com/shawmena-dotcom/product-factory |
| Changes in the last 7 days | 0 | 0 |
| First seen | 2026-10-11 | 2026-10-11 |
| Endpoint at the last check (differs) | Responded 4 days ago | Responded 10 h ago, requires a key |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
dev.mailkite/mailkite
Send email, manage domains, DNS, webhooks, templates, and inbound routing on MailKite
Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun
Letterkeel: send email from your own domain via SMTP, Resend, SendGrid, Mailgun, Postmark
How to run each
dev.mailkite/mailkite As a remote MCP server
claude mcp add --transport http mailkite https://mcp.mailkite.dev/mcpRequires: MAILKITE_API_KEY (secret)
Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
Requires: Authorization header
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Both endpoints responded at the last daily check. How we check endpoints
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
The marketplaces of Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun publish no settings it asks for, so we do not compare settings.
What it can do: dev.mailkite/mailkite · What it can do: Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun · Compare two other plugins
Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.