The Gravity Forms Postmark Add-On is a specialized extension designed to integrate the popular Gravity Forms plugin for WordPress with the Postmark email delivery service.
This integration is used to ensure that transactional emails generated by Gravity Forms—such as form submission notifications, confirmations, and auto-responders—are delivered reliably and quickly, bypassing common issues with standard WordPress email (which often uses the less reliable PHP mail() function).
Here is a breakdown of its purpose and key benefits:
Postmark is a leading service specifically built for sending transactional emails—emails that are triggered by a user's action (like submitting a form, resetting a password, or receiving an invoice).
The Gravity Forms Postmark Add-On's primary function is to:
Reroute Emails: Intercept all emails that Gravity Forms attempts to send.
Send via Postmark API: Reroute those emails through the highly reliable Postmark API, using your authenticated Postmark account.
Improve Deliverability: Since Postmark maintains excellent sender reputation and infrastructure, emails are much less likely to be marked as spam or delayed.
Feature
Description
Benefit for the User
High Deliverability
Uses Postmark's dedicated infrastructure and reputation for transactional emails.
Emails always reach the inbox. Crucial for lead notifications and confirmations.
Speed/Performance
Postmark is optimized for sending emails instantly, often faster than standard SMTP.
Instant feedback to users and immediate notification of leads.
Email Activity Logging
Allows you to track the status of every email sent (delivered, opened, bounced) directly within your Postmark account.
Troubleshooting capability; you know exactly why an email wasn't received.
No SMTP Configuration
Connects using Postmark's API key, avoiding complex Simple Mail Transfer Protocol (SMTP) settings.
Easy Setup and more secure authentication than traditional SMTP.
Custom Message Streams
Postmark allows separating notifications into different streams (e.g., separate streams for form notifications and user signups).
Better email organization and dedicated reputation for different types of mail.
Installation: You install and activate the Postmark Add-On and configure your Postmark API key and chosen Sender Signature (the email address Postmark is authorized to send from).
Configuration: You define which Postmark Message Stream (e.g., "Outbound" for general notifications, or a custom stream) your Gravity Forms notifications should use.
Sending: When a user submits a form, Gravity Forms passes the email data (to, from, subject, body) to the Postmark Add-On, which then transmits it securely to Postmark for delivery.
This add-on is generally recommended for any professional website using Gravity Forms where email reliability is mission-critical (e.g., lead generation, e-commerce, user registration).
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Published:
Dec 12, 2025 16:13 PM
Version:
v1.4
Category:
Author:
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GPL v2 or LaterTags: