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.

Pass the sender's sendUserId, sendUserEmail and sendUserMailboxId, the recipient's contactId or leadId, a subject and an HTML message. Set replyToActivityId to an email activity id (act_...), or to latest, to reply in the thread and reuse its subject. This sends a real email, so confirm the recipient and text first.

Set up

Use the first option your agent supports.

CLI (official)

Install the command, 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

Before doing anything else, make one read-only call to confirm access.

Rules

• Ask the user before anything that sends messages, costs money, or changes data.
• Never print API keys.