--- title: "How do you connect email to Claude?" description: "Connect email to Claude without code: add an email MCP server as a custom connector, approve it in the browser, and Claude sends from your domain." url: https://www.unitpost.com/blog/agents/connect-email-to-claude section: Blog updated: 2026-11-06 --- # How do you connect email to Claude? Add an email MCP server to Claude as a custom connector. On claude.ai, open Settings → Connectors → Add custom connector, paste the server URL (Unitpost's is https://mcp.unitpost.com/mcp) and approve in the browser. No code and no API key. Claude can then send email from a domain you've verified, check whether it was delivered and manage contacts, and it asks you before anything goes out. ## How do you connect email to Claude? > Connect email to Claude without code: add an email MCP server as a custom connector, approve it in the browser, and Claude sends from your domain. Claude can't send email on its own. It needs a tool, and the simplest one to give it is an email MCP server: a service that offers "send email", "list emails" and similar actions through the Model Context Protocol, the standard Claude uses to talk to outside tools. You connect it once, in settings, and then ask in plain words. ### What do you need first? - A Claude account that allows custom connectors. On a Team or Enterprise plan, an Owner may need to add the connector for the organization first. - A Unitpost account. The free plan is enough to try it; Pricing (/pricing) has the limits. - A domain you own, verified for sending. Unitpost gives you a few DNS records to add where your domain is managed, then checks them. It's often done within minutes, though DNS can take a few hours. Verify a domain (/docs/domains) walks through it, and the domain checker (/tools/domain-checker) shows what's missing. ### How do you connect it? - On claude.ai, open Settings → Connectors → Add custom connector. - Paste `https://mcp.unitpost.com/mcp` as the server URL and save. - A browser window opens. Sign in to Unitpost, pick the workspace, and approve. Every permission is a checkbox, so you can untick anything you don't want Claude to do. - Open a new chat, check that unitpost is switched on in the tools menu, and ask: "List my sending domains." If Claude answers with your domain, it's connected. The Claude setup guide (/docs/ai/claude) has the same steps, field by field. ### What can you ask Claude to do? Write the way you'd ask a colleague: - "Send a short thank-you email from hello@mydomain.com to jane@example.com." - "Did the email I sent to Jane this morning arrive?" - "Add these five people to my contacts and put them in a Beta testers segment." - "Draft this month's update to my newsletter list, but don't send it yet." Claude picks the right tool for each request. 30 things to ask an email and SMS MCP server (/blog/agents/email-sms-mcp-prompts) has more examples. ### Does Claude ask before it sends? Yes. Every tool that sends a message or changes your data is marked as having real effects, so Claude shows you what it's about to do and waits for your OK. You can also leave the send permission unticked when you approve, so Claude can read and draft but never send. Everything Claude sends appears under Emails in Unitpost, with its delivery status. To disconnect, remove the connector in Claude, or revoke it in Unitpost under Settings → Connected apps. ### What if it doesn't work? - "Domain not verified." Claude can only send from a domain whose DNS records Unitpost has confirmed. Check its status in Domains. - The connector shows no tools. Remove it and add it again, then finish the browser approval; closing that window early leaves it half-connected. - Claude says it can't send email. Make sure the unitpost connector is switched on in the chat's tools menu. Connectors can be on for one chat and off in the next. ## FAQ ### Do I need to write code to connect email to Claude? No. A custom connector is a URL you paste into Claude's settings, followed by a sign-in in your browser. Claude reads the tool list from the server, so there is nothing to install or configure by hand. ### Can Claude send email from my Gmail address? Not through a sending service like Unitpost. You can only send from a domain you can prove you own by adding DNS records, and nobody but Google can do that for gmail.com. Use your own domain, such as you@yourcompany.com. ### Does it work in the Claude desktop and mobile apps? Yes. A connector you add on claude.ai is available in Claude on the web, in the desktop app and on mobile. Claude Desktop can also add it from its own Settings → Connectors screen. ## Related - [Why domain verification should never be a one-time check](https://www.unitpost.com/blog/concepts/continuous-domain-verification): DNS changes after you verify a domain. How continuous re-verification with a grace period catches regressions without turning a transient blip into an outage. - [Why DKIM verification fails (and how to fix each cause)](https://www.unitpost.com/blog/troubleshooting/dkim-verification-failing): Why a DKIM check fails after you've published the key: a selector mismatch, a truncated public key, the wrong host, or a message changed in transit. - [Email bounce codes explained: hard, soft and policy rejections](https://www.unitpost.com/blog/deliverability/email-bounce-codes-explained): What 421 4.7.28, 550 5.7.1, 550 5.1.1, 452 4.2.2 and 550 5.7.26 mean, and whether to retry, slow down, fix authentication or remove the address.