How to connect Postmark and JustCall
Create a New Scenario to Connect Postmark and JustCall
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 Postmark, triggered by another scenario, or executed manually (for testing purposes). In most cases, Postmark or JustCall will be your first step. To do this, click "Choose an app," find Postmark or JustCall, and select the appropriate trigger to start the scenario.

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


Postmark

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


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JustCall


Authenticate JustCall
Now, click the JustCall node and select the connection option. This can be an OAuth2 connection or an API key, which you can obtain in your JustCall settings. Authentication allows you to use JustCall through Latenode.
Configure the Postmark and JustCall 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 Postmark and JustCall 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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JustCall
Trigger on Webhook
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Postmark
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Webhook response


Save and Activate the Scenario
After configuring Postmark, JustCall, 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 Postmark and JustCall integration works as expected. Depending on your setup, data should flow between Postmark and JustCall (or vice versa). Easily troubleshoot the scenario by reviewing the execution history to identify and fix any issues.
Most powerful ways to connect Postmark and JustCall
Postmark + JustCall + Slack: When a lead opens an email sent via Postmark, find the lead's contact information in JustCall and then send a notification to a Slack channel alerting the sales team.
JustCall + Zoho CRM + Postmark: When a call ends in JustCall, log the call details in Zoho CRM. Then, send a follow-up email via Postmark to the contact involved in the call.
Postmark and JustCall integration alternatives

About Postmark
Use Postmark in Latenode to automate transactional emails. Connect events from your apps to trigger personalized messages, like order confirmations or password resets. Benefit from Postmark’s deliverability, plus Latenode's visual workflow builder and flexible logic to filter events and enrich email data, ensuring accurate and timely communication.
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About JustCall
Use JustCall in Latenode to automate call workflows: trigger calls based on CRM updates, send SMS follow-ups, and log call data. Latenode adds visual flow control, custom logic, and data enrichment missing in basic JustCall setups. Create complex, scalable call-centric processes with no-code tools and flexible JavaScript.
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See how Latenode works
FAQ Postmark and JustCall
How can I connect my Postmark account to JustCall using Latenode?
To connect your Postmark account to JustCall on Latenode, follow these steps:
- Sign in to your Latenode account.
- Navigate to the integrations section.
- Select Postmark and click on "Connect".
- Authenticate your Postmark and JustCall accounts by providing the necessary permissions.
- Once connected, you can create workflows using both apps.
Can I trigger an outbound call when Postmark detects a bounced email?
Yes, you can! With Latenode, automatically trigger JustCall outbound calls for critical Postmark events, ensuring immediate follow-up and improved customer communication. Leverage no-code logic and JavaScript for advanced handling.
What types of tasks can I perform by integrating Postmark with JustCall?
Integrating Postmark with JustCall allows you to perform various tasks, including:
- Send SMS notifications via JustCall for critical Postmark email events.
- Create JustCall tasks for support teams based on Postmark delivery failures.
- Log Postmark email interactions in JustCall as call notes or activities.
- Automatically update JustCall contacts based on Postmark unsubscribe events.
- Trigger personalized call campaigns via JustCall based on Postmark email opens.
Can I use advanced filters for Postmark events on Latenode?
Yes! Latenode supports advanced filtering of Postmark events using code and AI steps. Tailor your workflows to specific criteria for precise automation.
Are there any limitations to the Postmark and JustCall integration on Latenode?
While the integration is powerful, there are certain limitations to be aware of:
- Historical data from Postmark prior to integration may not be accessible.
- Complex conditional logic may require JavaScript knowledge.
- Very high call volumes through JustCall can affect workflow execution time.