Getting Started
Amazon SES
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Amazon SES (Simple Email Service).
Standard Constants
Reference documentation for the CONSTANTS that are provided with the plugin but are not related to any specific integration.
Hooks
This category contains the available hooks that are available to developers within Gravity SMTP in order to extend its functionality.
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
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.
Mailchimp Transactional
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Mailchimp Transactional.
Mailgun
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Sinch Mailgun mail sending service.
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.
Zoho Mail
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Zoho Mail sending service.
Articles
Gravity SMTP Integration Slugs
Gravity SMTP integrations use lowercase reference slugs without spaces or special characters.
Using Constants To Hide Your Sensitive Settings
By using constants in your site’s wp-config.php file, you can securely store this information outside the WordPress admin interface.
GRAVITYSMTP_INTEGRATION_BACKUP
For advanced configurations and multisite setups, you can define a Backup integration for Gravity SMTP using constants.
GRAVITYSMTP_INTEGRATION_PRIMARY
For advanced configurations and multisite setups, you can define a Primary integration for Gravity SMTP using constants.
GRAVITYSMTP_ENABLED_EXPERIMENTAL_FEATURES
The GRAVITYSMTP_ENABLED_EXPERIMENTAL_FEATURES constant allows you to enable or disable experimental features in Gravity SMTP.
Alerts Constants
When set, these optional constants will override settings for the Alerts feature.
How To Send Emails From An Alias In Google / Gmail
This article explains configuring Gravity SMTP to send emails using a Gmail alias from a Google / Gmail account.
Zoho Mail Constants
Constants available for the Gravity SMTP Zoho Mail Integration.
Suppressing Email Addresses
This guide will walk you through how to use the suppression list, including adding, managing, and reactivating suppressed addresses.
Zoho Mail Settings Reference
This reference guide lists all settings related to the Zoho Mail integration in Gravity SMTP and describes their purpose.