Send email from HighLevel with Volanea by using a HighLevel Workflow trigger, a Custom Webhook action, and a server-side relay that calls Volanea’s REST email endpoint. This approach does not require a native HighLevel marketplace app, and it keeps your sending credentials out of browser code and contact-facing pages.

HighLevel is effective at collecting leads, moving opportunities through pipelines, and coordinating follow-up automation. Volanea is the sending layer: it accepts a transactional email request over HTTP and handles the infrastructure required to deliver that message. Connecting the two is therefore an event-to-email integration: HighLevel identifies when something happened, your relay translates the event into a deliberate email request, and Volanea sends it.

That separation matters. A webhook payload from a CRM is not automatically a production-ready email request. It may have an empty email address, incomplete names, duplicated delivery attempts, or fields that differ between a form lead and an existing contact. The implementation below accounts for those realities rather than treating a webhook as an unconditional “send” button.

What this HighLevel integration does—and does not do

Volanea does not provide a native HighLevel application, marketplace listing, or one-click plugin installation. The supported pattern is an HTTP integration built around HighLevel Workflows and its Custom Webhook action.

In this guide, the concrete initiating event is the HighLevel Workflow trigger named Form Submitted. When a contact submits a selected HighLevel form, the workflow posts contact and form data to an HTTPS endpoint you operate. That endpoint validates the request, maps the HighLevel fields into an email message, and calls Volanea’s email API.

The same relay pattern can later be reused for other HighLevel Workflow triggers, such as Contact Created or an opportunity-related trigger. Start with Form Submitted because it is easy to test: submit a form, inspect the resulting contact, and confirm a single delivery event.

The architecture is:

A visitor submits a HighLevel form.
The Form Submitted workflow trigger enrolls the matching contact.
A Custom Webhook workflow action sends a JSON request to your relay.
Your relay validates its shared secret and normalizes the data.
Your relay sends one Volanea transactional email request.
The relay returns a fast success response to HighLevel and records an idempotency key.

The important distinction is that HighLevel is the workflow source, not the place where browser-side code should hold sending credentials. The Volanea API key belongs in a server-side secret store, available only to the relay process that needs to send mail.

Why use a webhook relay instead of sending directly

A HighLevel Custom Webhook can make an outbound HTTP request, so a direct request to an email API may look tempting. For a proof of concept, it can be appropriate. For a production transactional flow, a relay is normally safer and easier to operate.

A relay gives you one controlled location for validation, deduplication, logging, template decisions, and error handling. It also prevents a workflow editor from needing access to your primary Volanea API key. HighLevel workflow settings are not client-side JavaScript, but they are still configuration visible to users who can edit or inspect that workflow. A long-lived sending key should not be broadly exposed merely because someone needs to change a form automation.

What the relay adds

The relay can make decisions that a static webhook body cannot make reliably:

Reject a missing or malformed recipient address before calling the sending API.
Choose a fallback name when first_name is blank.
Allow only approved sender addresses and prevent unexpected form values from becoming sender fields.
Turn repeated webhook deliveries into one email using an idempotency key.
Return a quick 2xx response to HighLevel while you retain structured logs for troubleshooting.
Keep Volanea credentials in environment variables or a managed secret store.
Add a stable internal event ID to correlate HighLevel activity with a message request.

This is also the right place to apply business rules. For example, an enquiry form may deserve an immediate confirmation email, while an internal sales notification should go to a fixed team mailbox. Do not allow arbitrary form fields to control from, reply_to, or a recipient list without explicit validation.

A direct webhook is still useful for limited cases

If the message is simple, the workflow has tightly controlled administrators, and the email API accepts the exact body HighLevel can construct, a direct request can reduce moving parts. It becomes less attractive as soon as you need branching, reusable templates, reliable replay protection, or multiple payload shapes.

For most teams, use the direct webhook only to validate connectivity, then retain the relay as the durable integration boundary. Review the email API reference and setup guides before implementing the sending call, especially if your account uses a different API version or sender-domain configuration.

Build the HighLevel workflow around Form Submitted

Create or open the workflow in the appropriate HighLevel location. Add the Form Submitted trigger and select the specific form that should start the email flow. A workflow with an unfiltered Form Submitted trigger can be valid, but it is easier to make mistakes when multiple forms serve different purposes.

Next, add any gates that should happen before email is sent. Typical examples include checking that the contact has an email address, excluding test submissions, requiring consent for marketing content, or branching by the form’s selected product or location.

Then add a Custom Webhook action. Configure it to make a POST request to a URL such as:

https://automation.example.com/hooks/highlevel/form-submitted

Use HTTPS. A public HTTP endpoint is not appropriate for contact data or authentication headers. In the action’s custom headers, send a dedicated shared secret to your relay—not your Volanea API key:

Content-Type: application/json
X-HighLevel-Webhook-Secret: {{your-static-shared-secret}}

The exact placement and available workflow fields can vary with HighLevel account configuration and product updates. Before activating the workflow, use HighLevel’s test or preview capability where available and inspect the received request in your relay logs. Treat the actual received JSON as the contract for your location and workflow.

The payload is defined by the Custom Webhook action

A crucial detail: HighLevel Custom Webhooks do not impose one universal JSON body for every workflow. The request body is constructed from the custom data you configure in that action, including HighLevel merge fields. That is why copying a random payload from another account is risky.

For this Form Submitted workflow, configure the Custom Webhook body as JSON in this shape:

{
  "event": "form_submitted",
  "contact_id": "{{contact.id}}",
  "email": "{{contact.email}}",
  "first_name": "{{contact.first_name}}",
  "last_name": "{{contact.last_name}}",
  "phone": "{{contact.phone}}",
  "form_name": "Website enquiry",
  "submitted_at": "{{system.date}}"
}

The merge fields are resolved by HighLevel when it sends the workflow action. Values can be empty. For example, a form that asks only for an email address may produce an empty first_name, while a contact created through another path may have no phone number. Your receiving code must tolerate that instead of producing an email with a literal unresolved placeholder.

Do not include every contact field by default. Send the smallest payload your email decision requires. Fewer fields reduce accidental disclosure of contact information, simplify debugging, and make changes less likely to break downstream code.

Map the HighLevel event to a Volanea email request

The relay should treat the inbound body as untrusted input, even though it came from a workflow you control. Validate its schema, normalize strings, and construct a new request for Volanea from known values.

The following example is a Node.js Express endpoint. It expects the webhook body configured above, uses an environment variable for the Volanea API key, and sends a confirmation message. The Volanea request is deliberately made on the server; neither the API key nor the endpoint logic is exposed to the person submitting the HighLevel form.

import express from "express";
import crypto from "node:crypto";

const app = express();
app.use(express.json({ limit: "100kb" }));

const {
  HIGHLEVEL_WEBHOOK_SECRET,
  VOLANEA_API_KEY,
  VOLANEA_FROM_EMAIL = "hello@example.com"
} = process.env;

// Replace this with Redis, Postgres, or another shared store in production.
const seenEvents = new Set();

app.post("/hooks/highlevel/form-submitted", async (req, res) => {
  const suppliedSecret = req.get("X-HighLevel-Webhook-Secret");

  if (!suppliedSecret || suppliedSecret !== HIGHLEVEL_WEBHOOK_SECRET) {
    return res.status(401).json({ error: "unauthorized" });
  }

  const payload = req.body ?? {};
  const email = String(payload.email ?? "").trim().toLowerCase();
  const firstName = String(payload.first_name ?? "").trim();
  const lastName = String(payload.last_name ?? "").trim();
  const formName = String(payload.form_name ?? "Website enquiry").trim();
  const contactId = String(payload.contact_id ?? "").trim();

  if (payload.event !== "form_submitted") {
    return res.status(400).json({ error: "unexpected event" });
  }

  if (!email || !/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email)) {
    // Return 2xx for a non-retryable data issue after logging it internally.
    return res.status(202).json({ skipped: "missing_or_invalid_email" });
  }

  // This key makes equivalent deliveries for this contact/form/day collapse to one send.
  const dateBucket = new Date().toISOString().slice(0, 10);
  const idempotencyKey = crypto
    .createHash("sha256")
    .update(`${contactId}:${formName}:${dateBucket}`)
    .digest("hex");

  if (seenEvents.has(idempotencyKey)) {
    return res.status(200).json({ duplicate: true });
  }

  const recipientName = [firstName, lastName].filter(Boolean).join(" ");
  const greeting = firstName ? `Hi ${firstName}` : "Hi";

  // Field mapping:
  // HighLevel payload.email      -> Volanea to[0].email
  // HighLevel first_name/last_name -> Volanea to[0].name and message body
  // Fixed approved sender          -> Volanea from.email
  // Workflow form_name             -> metadata, never a sender address
  const volaneaPayload = {
    from: { email: VOLANEA_FROM_EMAIL, name: "Example Company" },
    to: [{ email, name: recipientName || undefined }],
    subject: "We received your enquiry",
    html: `<p>${greeting},</p><p>Thanks for submitting the ${escapeHtml(formName)} form. Our team will be in touch shortly.</p>`,
    text: `${greeting},\n\nThanks for submitting the ${formName} form. Our team will be in touch shortly.`,
    metadata: {
      source: "highlevel",
      highlevel_contact_id: contactId,
      highlevel_event: "form_submitted",
      idempotency_key: idempotencyKey
    }
  };

  const response = await fetch("https://api.volanea.com/v1/emails/send", {
    method: "POST",
    headers: {
      "Authorization": `Bearer ${VOLANEA_API_KEY}`,
      "Content-Type": "application/json",
      "Idempotency-Key": idempotencyKey
    },
    body: JSON.stringify(volaneaPayload)
  });

  const responseBody = await response.text();

  if (!response.ok) {
    console.error("Volanea send failed", {
      status: response.status,
      contactId,
      responseBody
    });
    return res.status(502).json({ error: "email_provider_error" });
  }

  seenEvents.add(idempotencyKey);
  console.info("Volanea email accepted", { contactId, email, idempotencyKey });
  return res.status(200).json({ accepted: true });
});

function escapeHtml(value) {
  return String(value)
    .replaceAll("&", "&amp;")
    .replaceAll("<", "&lt;")
    .replaceAll(">", "&gt;")
    .replaceAll('"', "&quot;")
    .replaceAll("'", "&#039;");
}

app.listen(3000);

The code shows the mapping explicitly, but do not copy an API URL or request schema blindly if your Volanea account’s API documentation specifies a different versioned endpoint or message object. The principle remains the same: the relay sends a server-side POST, authenticates with the Volanea API key, and passes only validated recipient and message fields.

Use templates carefully

For a single acknowledgement email, inline html and text are easy to understand. For a business workflow with several messages, use a maintained template strategy instead of embedding large HTML documents in the webhook relay.

Keep the template ID or message type in source control or trusted server configuration. Let HighLevel pass an event such as new_enquiry, but let the relay decide which approved subject, sender, and template correspond to it. This avoids a low-code workflow edit accidentally changing a regulated message or a branded sender identity.

Keep Volanea credentials out of HighLevel and the browser

The Volanea API key should live in a secret manager or server-side environment variable on the relay platform. Examples include your cloud function’s encrypted environment settings, a managed secrets service, or deployment-platform secrets. It should never be placed in a HighLevel form’s custom JavaScript, a public page source, a mobile app bundle, or a client-visible configuration file.

On the HighLevel side, store only the relay URL and a separate webhook shared secret in the Custom Webhook action. That secret authenticates HighLevel to your relay; it does not grant the ability to send email through Volanea. If it is exposed, rotate it and update the relay plus the workflow. If a Volanea API key is exposed, rotate it immediately and review sending activity.

A useful access model is:

HighLevel workflow: knows the relay URL and a narrowly scoped inbound shared secret.
Relay: knows the inbound secret and the Volanea API key.
Volanea: receives only a signed or authenticated server-to-server API request.
Browser/form submitter: knows none of those secrets.

Use a dedicated Volanea key for this integration where possible. Naming a key for highlevel-form-relay-production makes later audits and rotations less disruptive than sharing one account-wide key among unrelated applications.

Design for duplicate events, timeouts, and incomplete fields

Webhook integrations fail at boundaries. The form can submit correctly while the workflow is delayed; the relay can send an email successfully but lose the response; a downstream API can accept a request while the caller times out. Production design means deciding what should happen in each case before customers receive duplicate confirmations.

HighLevel retries can create duplicate sends

A failed, delayed, or non-2xx webhook delivery may be retried by the automation system, and a contact can also be enrolled more than once through workflow configuration or testing. If every incoming request immediately creates a new message, the contact can receive duplicate emails.

Use durable idempotency, not the in-memory Set in the example. Store the idempotency key in Redis with an expiry or in a database with a unique constraint. The best key depends on the business event. A contact ID plus form name plus date may be sufficient for one confirmation per day, but it would be wrong for a form that users legitimately submit multiple times in a day.

Where HighLevel provides an event-specific identifier in the payload available to your workflow, use that as the preferred idempotency basis. If it does not, generate and persist an internal event record before attempting the send. Pass the same idempotency value to Volanea if the API supports idempotency headers or keys for the endpoint you use.

A webhook timeout is not proof that email failed

Do not make the relay wait on slow, unrelated work before responding. Validate, deduplicate, submit the email request, record the outcome, and return a response promptly. If you need CRM enrichment, AI generation, attachment creation, or multiple API calls, place that work on a queue and return an acknowledgement once the request has been safely accepted for processing.

The ambiguous case is the most important one: Volanea may accept the email, but the relay may time out before it can reply to HighLevel. A retry can then arrive. Idempotency is what prevents that uncertain network outcome from becoming two messages.

Some fields will be missing

HighLevel contact data is not guaranteed to be complete. A form may not collect first name. Contacts imported from another system can have unusual whitespace, duplicate records, or an invalid legacy address. Custom fields also depend on the location and form design; a field used in one sub-account may not exist in another.

Treat missing email as a skipped event, not a provider error. Treat an absent name as a fallback greeting. Validate any custom field before it affects message content, and avoid using form input as raw HTML. The example escapes the form name before interpolation because untrusted input should not be inserted directly into an HTML email.

For better list hygiene before a campaign-like flow, validate addresses at intake with the free address verification tool. Address verification does not replace consent management or suppression handling, but it can help identify malformed or risky addresses before they enter repeated automation.

Test the workflow in a controlled sequence

Do not turn on a live workflow and use a customer’s inbox as the first integration test. Create a dedicated test form, test contact, and mailbox. Use a sender domain that has been configured for your Volanea account before relying on it for real recipient delivery.

Run this sequence:

Submit the selected HighLevel form with a test email address and a first name.
Confirm that the contact entered the intended workflow and reached the Custom Webhook action.
Inspect relay logs to verify the resolved JSON payload, without logging full sensitive content unnecessarily.
Confirm that the relay made exactly one Volanea request and received a successful response.
Check the received message’s subject, greeting, sender, reply path, and HTML/text rendering.
Repeat with no first name, no phone number, and an invalid email address.
Replay the same webhook payload to confirm the idempotency store blocks a second send.

Test negative paths deliberately. Temporarily make the Volanea request fail in a non-production environment and observe what HighLevel does with the webhook action. The goal is not merely to see an error; it is to verify that your logs identify the contact, event, response status, and retry-safe key without exposing credentials.

Deliverability and consent still apply

A successful API response means the sending system accepted the message request. It does not mean a recipient has opened the email, that an inbox provider will place it in the primary inbox, or that the message was appropriate to send.

For transactional confirmations, use a sender address on a domain you control and configure the domain authentication records required by your sending setup. Keep the message aligned with the action the person just took: “we received your enquiry” is a reasonable confirmation after a form submission; a promotional sequence is not automatically justified by every form submission.

Separate transactional and marketing logic in HighLevel. A Form Submitted trigger can launch either type of communication, but your own policy and applicable rules should decide whether the contact has consented to marketing. Include appropriate unsubscribe handling for promotional email and honor suppressions consistently across systems.

Operationally, avoid mixing unrelated mail classes under one vague workflow. A password reset, a booking confirmation, a sales enquiry acknowledgement, and a newsletter have different urgency, content expectations, and complaint risk. The relay is a practical place to enforce that distinction with approved message types.

Alternatives when a webhook relay is not your preferred stack

A small Node, Python, PHP, or serverless relay is the most flexible option because you control the payload transformation and security model. It is not the only option.

An automation platform such as Zapier or Make can receive a HighLevel-originated event, transform fields, and call an HTTP email endpoint. That can be useful for non-engineering teams and simple flows. However, examine how the platform stores connection credentials, how it handles retry behavior, whether it can send custom HTTP headers, and whether its task limits affect cost or throughput.

A direct HighLevel Custom Webhook request is the lightest option. It is best reserved for simple, low-risk requests where the body can be authored safely in the workflow and access to the sending credential is tightly restricted. It gives up many of the relay’s controls, particularly durable idempotency and centralized validation.

An SMTP-based connection is a different integration model and is not the workflow HTTP pattern described here. If your requirement is specifically to generate a Volanea email because a HighLevel workflow event occurred, use the Custom Webhook plus API relay approach. It gives you a clear audit trail from form submission through email request.

Practical operating checklist

Before moving this integration to production, confirm each of the following:

The HighLevel Form Submitted trigger is limited to the intended form.
The Custom Webhook action uses POST to an HTTPS relay URL.
The body contains only required contact and event fields.
The relay validates a separate inbound shared secret.
The Volanea API key is stored only in server-side secrets.
The sender address is approved and appropriate for the message type.
Missing email, missing name, and malformed values have defined behavior.
Idempotency is stored durably rather than in process memory.
Failures create alerts or searchable logs with safe correlation IDs.
Test and production workflows, keys, and sender addresses are separated.

This checklist is more than operational polish. It turns a basic webhook into a controlled message pipeline that can survive staff changes, form edits, retries, and provider-side incidents.

Conclusion

To send email from HighLevel with Volanea, use HighLevel’s Form Submitted workflow trigger and Custom Webhook action to call a secure relay, then let that relay make the authenticated Volanea API request. There is no native HighLevel plugin required—and no reason to expose a sending key in a form or browser.

The implementation succeeds when it does more than deliver a first test email. Validate the actual HighLevel payload, map only the fields you need, keep credentials server-side, and make duplicate delivery impossible by design. Those controls make the integration dependable as your forms, workflows, and sending volume grow.

FAQ

Can I install Volanea from the HighLevel marketplace?

No. Volanea does not provide a native HighLevel marketplace app or plugin. Connect the platforms through a HighLevel Workflow Custom Webhook and a server-side relay that calls Volanea’s REST API.

What HighLevel event should trigger the email?

Use the Form Submitted Workflow trigger when an acknowledgement should follow a particular form submission. You can apply the same webhook pattern to other workflow triggers later, but begin with one specific trigger and a clearly defined payload.

Where should I store the Volanea API key?

Store it in the relay’s server-side environment variables or secret manager. Do not put it in HighLevel form JavaScript, public website configuration, or any client-visible code. HighLevel should hold only a separate secret used to authenticate to your relay.

How do I stop duplicate emails after a webhook retry?

Create a durable idempotency key for the business event, save it in Redis or a database, and reject or acknowledge repeats without sending again. Use an event-specific identifier when available; otherwise combine stable fields with a business-appropriate time window.

What happens if the contact has no email address?

Your relay should treat that as a non-retryable skipped event, log it safely, and return a successful acknowledgement to prevent futile webhook retries. Do not call the email API with an empty recipient field.

How to Send Email From HighLevel With Volanea