Send Email

output.send-email Output v0.1.0

Sends an email over SMTP (STARTTLS/TLS/none, AUTH PLAIN/LOGIN). Leave the body blank to send the input payload as pretty-printed JSON. No attachments in v1.

The Send Email step on the Studio canvas — The **Send Email** step as it appears on the Studio canvas — input pins on the left, output ports on the right.

Finding it in the library

Search the builder's node library for Send Email (it lives under Output). A single click opens the in-editor docs panel shown here — description, ports, and every property, without leaving the canvas. Double-click (or drag) to add it to the workflow.

Send Email in the node library, with the in-editor docs panel open — The library entry and the in-editor docs panel for **Send Email** — the same reference this page is generated from.

Wired up in the builder

Send Email in a real, runnable flow — captured live from the Studio editor, exactly as it looks on your canvas. This is the same workflow used for the example input & output below.

Send Email wired into a runnable workflow in the Studio builder — **Send Email** wired into a runnable flow — input on the left, output on the right.

How it’s configured

The node’s Configure panel as it opens in the builder when you select the step — every setting laid out with real values. Click any field to edit it.

The Send Email node's Configure panel in the Studio builder — The **Configure** panel for **Send Email**, showing the settings from the flow above.

Ports

Ports are the node’s contract with its neighbours. In the editor a port label renders bold when wired and italic when optional; ◈ ports accept attachment carriers rather than data wires.

Direction	Port	Label	What flows through it
Input	`input`	Input
Output	`output`	Send result

How data flows through it

Send Email consumes the content of the incoming envelope — when it is fed directly by a trigger, the trigger’s wrapper is unwrapped at the node boundary so the node sees the actual data, not the metadata shell. Its output becomes the payload for the next node, while the envelope (trace ids, correlation, binary refs) rides along untouched. In the Runs view you always see the whole envelope for both sides of this node.

Expressions in the config

String-typed properties accept {{ }} expressions evaluated against the incoming item at run time — e.g. {{ $json.customer.email }}. On this node that’s host, user, password, from, to, cc, bcc, subject, body. JSON- and code-typed fields never interpolate — they are passed through literally.

Build it with AI

Every node in this reference is reachable through Flowdrome’s AI Copilot and the MCP tools — say what you want, and the graph surgery happens server-side. Node types resolve fuzzily, so the catalog label (Send Email) works as well as the exact type id (output.send-email).

In the Copilot panel (or any connected AI):

add a send email node after the trigger

As a step in a create_chain_workflow call:

{"type":"Send Email","config":{}}

Raw MCP call — add this node to a workflow with add_node

curl -s -X POST http://localhost:48170/mcp -H "content-type: application/json" -d '{ "jsonrpc": "2.0", "id": "1", "method": "tools/call", "params": { "name": "add_node", "arguments": { "workflowId": "<id>", "type": "Send Email" } } }'

Example input & output

Captured from a real test run of the workflow above — this is what you see in the run data panel after pressing Test workflow.

Input — what the node received

The Send Email node's input envelope in the run data viewer — The input envelope in the Runs view — Flowdrome always shows the whole envelope, with the payload inside `body`.

Output — what the node produced

The Send Email node's output envelope in the run data viewer — The output envelope after the step ran.

Property reference

Every setting, with its type and default — the same fields shown configured in the panel above.

Property	Type	Default	Description
Credential `credentialId`	`credential`	`""`	Use a stored credential for this connection — its fields are filled in at run start. Pick "None" to enter the connection details manually. accepts credential templates: `smtp`
SMTP host `host`	`string`	`—`	SMTP server hostname, e.g. smtp.example.com.
Port `port`	`int`	`587`	SMTP port — typically 587 for STARTTLS, 465 for TLS, 25 for none.
Security `secure`	`select`	`"starttls"`	STARTTLS upgrades a plain connection (port 587); TLS connects encrypted from the start (port 465); None sends in the clear. `nonestarttlstls`
User `user`	`string`	`""`	SMTP username. Leave blank to skip authentication.
Password `password`	`string`	`""`	SMTP password — supports ${credential.NAME.FIELD}.
From `from`	`string`	`—`	Sender address, e.g. reports@example.com.
To `to`	`string`	`—`	Recipient address(es), comma-separated.
Cc `cc`	`string`	`""`	Carbon-copy address(es), comma-separated.
Bcc `bcc`	`string`	`""`	Blind-carbon-copy address(es), comma-separated.
Subject `subject`	`string`	`""`	Subject line. Non-ASCII text is UTF-8 encoded automatically.
Body type `bodyMode`	`select`	`"text"`	Send the body as plain text or HTML. `htmltext`
Body `body`	`string`	`""`	Message body. Leave blank to send the input payload as pretty-printed JSON.
Timeout (ms) `timeoutMs`	`int`	`15000`	Abort the SMTP conversation after this many milliseconds.

Related nodes

The rest of the Output group — the same folder you’d scan in the editor’s library.

This page is generated from the node registry by gen-node-docs.mjs on every site build — ports, properties, defaults and visibility rules cannot drift from the code. The screenshots and example data are captured from a live Flowdrome by npm run shots:nodes and npm run gen:examples.