How to connect 123FormBuilder and Mailgun
Create a New Scenario to Connect 123FormBuilder and Mailgun
In the workspace, click the “Create New Scenario” button.

Add the First Step
Add the first node – a trigger that will initiate the scenario when it receives the required event. Triggers can be scheduled, called by a 123FormBuilder, triggered by another scenario, or executed manually (for testing purposes). In most cases, 123FormBuilder or Mailgun will be your first step. To do this, click "Choose an app," find 123FormBuilder or Mailgun, and select the appropriate trigger to start the scenario.

Add the 123FormBuilder Node
Select the 123FormBuilder node from the app selection panel on the right.

123FormBuilder
Configure the 123FormBuilder
Click on the 123FormBuilder node to configure it. You can modify the 123FormBuilder URL and choose between DEV and PROD versions. You can also copy it for use in further automations.
Add the Mailgun Node
Next, click the plus (+) icon on the 123FormBuilder node, select Mailgun from the list of available apps, and choose the action you need from the list of nodes within Mailgun.

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Authenticate Mailgun
Now, click the Mailgun node and select the connection option. This can be an OAuth2 connection or an API key, which you can obtain in your Mailgun settings. Authentication allows you to use Mailgun through Latenode.
Configure the 123FormBuilder and Mailgun Nodes
Next, configure the nodes by filling in the required parameters according to your logic. Fields marked with a red asterisk (*) are mandatory.
Set Up the 123FormBuilder and Mailgun Integration
Use various Latenode nodes to transform data and enhance your integration:
- Branching: Create multiple branches within the scenario to handle complex logic.
- Merging: Combine different node branches into one, passing data through it.
- Plug n Play Nodes: Use nodes that don’t require account credentials.
- Ask AI: Use the GPT-powered option to add AI capabilities to any node.
- Wait: Set waiting times, either for intervals or until specific dates.
- Sub-scenarios (Nodules): Create sub-scenarios that are encapsulated in a single node.
- Iteration: Process arrays of data when needed.
- Code: Write custom code or ask our AI assistant to do it for you.

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AI Anthropic Claude 3
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Mailgun
Trigger on Webhook
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123FormBuilder
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Iterator
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Webhook response

Save and Activate the Scenario
After configuring 123FormBuilder, Mailgun, and any additional nodes, don’t forget to save the scenario and click "Deploy." Activating the scenario ensures it will run automatically whenever the trigger node receives input or a condition is met. By default, all newly created scenarios are deactivated.
Test the Scenario
Run the scenario by clicking “Run once” and triggering an event to check if the 123FormBuilder and Mailgun integration works as expected. Depending on your setup, data should flow between 123FormBuilder and Mailgun (or vice versa). Easily troubleshoot the scenario by reviewing the execution history to identify and fix any issues.
Most powerful ways to connect 123FormBuilder and Mailgun
123FormBuilder + Mailgun + Slack: When a new submission is received in 123FormBuilder, Mailgun sends a confirmation email to the submitter. Then, a notification is posted to a designated Slack channel to alert the team.
Mailgun + 123FormBuilder + Google Sheets: When Mailgun detects a permanent failure (bounce), indicating an invalid email address, the associated submission details are retrieved from 123FormBuilder, and the email and submission data are added to a Google Sheet for analysis and cleaning.
123FormBuilder and Mailgun integration alternatives
About 123FormBuilder
Streamline data collection by connecting 123FormBuilder to Latenode. Automatically trigger workflows when forms are submitted. Route form data to CRMs, databases, or email marketing tools. Use Latenode to validate entries, calculate scores, and manage follow-ups — automating processes with a no-code, scalable workflow.
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About Mailgun
Use Mailgun in Latenode to automate email sending within your workflows. Trigger emails based on data changes, form submissions, or scheduled events. Latenode lets you filter, format, and personalize messages using data from other apps, creating dynamic campaigns and notifications without complex coding. Scale your outreach affordably by paying only for execution time.
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See how Latenode works
FAQ 123FormBuilder and Mailgun
How can I connect my 123FormBuilder account to Mailgun using Latenode?
To connect your 123FormBuilder account to Mailgun on Latenode, follow these steps:
- Sign in to your Latenode account.
- Navigate to the integrations section.
- Select 123FormBuilder and click on "Connect".
- Authenticate your 123FormBuilder and Mailgun accounts by providing the necessary permissions.
- Once connected, you can create workflows using both apps.
Can I send personalized emails upon form submission?
Yes, you can! Latenode lets you trigger Mailgun emails with data from 123FormBuilder. Use dynamic fields for personalized messages, enhancing customer engagement automatically.
What types of tasks can I perform by integrating 123FormBuilder with Mailgun?
Integrating 123FormBuilder with Mailgun allows you to perform various tasks, including:
- Automatically sending confirmation emails after form submissions.
- Adding new form submitters to a Mailgun mailing list.
- Triggering targeted email campaigns based on form data.
- Sending internal notifications for urgent form submissions.
- Creating custom reports based on form and email activity.
Can I use custom JavaScript with 123FormBuilder and Mailgun on Latenode?
Yes, you can! Latenode's JavaScript blocks let you add advanced logic to your 123FormBuilder and Mailgun automations for ultimate control and customization.
Are there any limitations to the 123FormBuilder and Mailgun integration on Latenode?
While the integration is powerful, there are certain limitations to be aware of:
- Complex form logic may require advanced JavaScript knowledge.
- Large file attachments from 123FormBuilder may impact email delivery times.
- Mailgun's sending limits apply to emails triggered by 123FormBuilder.