Send an email from the inbox

Send an email from the inbox

Sends one email to a lemlist contact or lead from a connected mailbox, as a new message or as a reply in their latest thread.

Note: Sends a real email: confirm the recipient and text first. Needs the sender's sendUserId, sendUserEmail and sendUserMailboxId.

Set up

Use the first option your agent supports.

CLI (official)

Install the command and sign in with it, then confirm it runs.

npm install -g @lemlist-official/cli
lemlist --version

Run lemlist api POST /inbox/email.

API (official)

• Base URL: https://api.lemlist.com/api
• Endpoint: POST /inbox/email
• Auth: send the header Authorization: Basic $LEMLIST_API_KEY
• Get a key: https://app.lemlist.com/settings/integrations
• Docs: https://developer.lemlist.com/api-reference/getting-started/authentication

Note: LEMLIST_API_KEY holds the base64 of :<api key>, an empty username and the key; 20 requests every 2 seconds per key.

Before anything else, confirm access with the cheapest read-only call, like a list or a search. Never send or change anything to test access.

Rules

• Ask the user before anything that sends messages, costs money, or changes data, and say how many records it touches. One approval covers a batch the user has seen.
• Never print API keys.