Hooks
This category contains the available hooks that are available to developers within Gravity SMTP in order to extend its functionality.
Standard Constants
Reference documentation for the CONSTANTS that are provided with the plugin but are not related to any specific integration.
Getting Started
Brevo
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Brevo mail sending service.
Constants
This category contains a list of the constants that can be set within the wp-config.php file of your WordPress installation.
User Guides
Google / Gmail
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Google / Gmail to send transactional emails.
Integrations
Mailgun
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Sinch Mailgun mail sending service.
Developer
This category contains documentation related to developer-specific use cases of the Gravity SMTP plugin. The items contained here are not required for normal operation of Gravity SMTP.
Microsoft 365 / Outlook
This category includes documentation related to integrating Gravity SMTP with a Microsoft 365 account outgoing email service.
Postmark
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Active Campaign's Postmark mail sending service.
SendGrid
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Twilio Sendgrid mail sending service.
Articles
Connecting to Brevo
This article shows you the steps required to integrate Gravity SMTP on your website with the Brevo Messaging API service by Brevo.
GRAVITYSMTP_LICENSE_KEY
The GRAVITYSMTP_LICENSE_KEY constant in Gravity SMTP automatically pre-populates your Gravity SMTP license key.
GRAVITYSMTP_EVENT_LOG_RETENTION
The GRAVITYSMTP_EVENT_LOG_RETENTION constant in Gravity SMTP defines the number of days to retain logs.
GRAVITYSMTP_TEST_MODE
The GRAVITYSMTP_TEST_MODE constant in Gravity SMTP enables or disables test mode.
GRAVITYSMTP_EVENT_LOG_ENABLED
The GRAVITYSMTP_EVENT_LOG_ENABLED constant in Gravity SMTP enables or disables the email log.
Getting Started: A Checklist for the New User
Step-by-step guide for getting the Gravity SMTP plugin running on your site.
Getting a Postmark Server API Token
Instructions on the required step of getting a Server API token for connecting with the Postmark API.
Adding and Verifying a Domain in Postmark
Instructions on the required step of adding and verifying a domain within your Postmark account.
Getting a SendGrid API Key
Instructions on the required step of getting an API key for connecting with the SendGrid API.
Authenticating a Domain in SendGrid
Instructions on the required step of authenticating a domain within your SendGrid account.