Notion agent email signature
Notion Custom Agents draft and send email from the Gmail or Outlook account you connect. Add Signatoro to the agent, and it fetches your current signature before each email.
Notion Custom Agents and your email
Custom Agents run inside Notion on the instructions you write, on a schedule, on a trigger or when you chat with them. They come with Notion's Business and Enterprise plans.
With the Mail connection, an agent reads, organizes, drafts and sends email from your Gmail or Outlook account. You choose its permissions when you connect:
- Draft: the agent creates drafts in your mailbox.
- Send: the agent sends email from your account.
- Require confirmation: you approve or cancel each action before it runs.
- Mail triggers, such as "New email received", start the agent when email arrives.
Give your Custom Agent your signature
Signatoro runs an MCP server. Add it to the agent as a custom MCP server, and the agent fetches your current signature before each email, so a change on Signatoro reaches its next email. MCP connections are part of Notion's Business and Enterprise plans.
- Build and save your signature on Signatoro.
- A workspace admin turns on custom servers first: Settings > Connections, then "Enable custom MCP servers" in the Manage tab. A workspace that limits connections to approved ones adds the Signatoro URL as an approved custom MCP server.
- Open the agent's Settings, go to Tools & Access and click "Add connection", then "Custom MCP server".
- Paste https://signatoro.com/mcp as the URL and name it Signatoro. Leave the header authentication empty: Signatoro signs you in with OAuth.
- Click Connect and sign in to Signatoro.
- Expand the Signatoro connection and set get_signature and list_signatures to "Run automatically", so the agent fetches the signature without asking each time.
- Paste the email signature rule into the agent's Instructions. Notion suggests naming the server in the instructions, so start the rule with "Use the Signatoro MCP".
- Ask the agent to send you one test email, then open it in your Sent folder and check the signature at the bottom.
Drafts first, then sends
To review email before it goes out, give the agent the Draft permission and tell it to save drafts for your review. The drafts land in your Gmail or Outlook, where you open one and check that it ends with one signature.
Once the drafts look right, add the Send permission, or keep "Require confirmation" on to approve each send in Notion.
One agent, one sign-in
Each MCP connection in Notion belongs to one Custom Agent and uses the credentials of the person who connected it. Every email from that agent carries that person's signature, whoever starts the run.
For a team, each person adds Signatoro to their own agent, so each email carries the signature of the person whose inbox it comes from. A second agent needs its own Signatoro connection.
Your signature or your AI assistant's
A Custom Agent sends from the Gmail or Outlook account you connect, so its emails carry your signature. Connect a mailbox where the agent works as itself, such as a shared support inbox, and its emails there carry an AI assistant signature that says an AI sent it.
Each AI assistant or agent gets its own key or MCP connection and signs as the person it works for or as itself, by default with a line saying it is an AI and whom it acts for. Free includes 1 AI assistant; each person on a Company plan gets 3 AI assistants, and the company gets 3, 10 or 25 agents by size, on top of the people the plan covers.
Add an AI assistant on Signatoro and choose whether it signs as you or as the agent. Under "Connected assistants" on your signature page, leave "Signs as" on "Me" and the agent picks a signature per email with list_signatures, asking you when it is unclear, or set it to the assistant and every email carries the signature of that assistant.
Notion agent email signature questions
How do I add an email signature to a Notion agent?
Add Signatoro to the Custom Agent as a custom MCP server at https://signatoro.com/mcp, sign in, and paste the email signature rule into the agent's Instructions. The agent then fetches your signature before each email. Send one email and check the bottom of it in your Sent folder.
Can Notion agents send emails?
Yes. With the Mail connection and the Send permission, a Custom Agent sends email from your Gmail or Outlook account. Turn on "Require confirmation" to approve each send, or tell the agent to save drafts for your review.
Why is "Custom MCP server" missing in my Notion agent?
A workspace admin turns it on under Settings > Connections, with "Enable custom MCP servers" in the Manage tab. MCP connections need a Business or Enterprise plan.
Can my team share one Notion agent for email?
A shared agent uses the Signatoro sign-in of the person who connected it, so its emails carry that person's signature. Anyone with access to an agent connected to Mail can view the connected inbox, so each person builds their own agent for their own email.
Sources
Checked against Notion's help center on October 11, 2026.