Developer

Hooks

This category contains the available hooks that are available to developers within Gravity SMTP in order to extend its functionality.

Constants

This category contains a list of the constants that can be set within the wp-config.php file of your WordPress installation.

Articles

Configuring a Gravity SMTP Integration Using Constants

This article covers the necessary constants for enabling integrations using constants.

Configuring Integrations with Custom API Parameters

This article explains how to configure integrations in Gravity SMTP to use provider-specific parameters to enable GDPR-compliant routing or other requirements.

Google Constants

Constants available for the Gravity SMTP Google Integration.

Microsoft Constants

When set, these optional constants will override settings for the Microsoft 365 / Outlook Integration in Gravity SMTP.

PHP Mail Constants

Constants available for the PHP Mail integration.

Mailchimp Transactional Constants

Constants available for the Mailchimp Transactional integration.

SMTP.com Constants

When set, these optional constants will override settings for the SMTP.com integration in Gravity SMTP. Default values are shown.

Zoho Mail Constants

Constants available for the Gravity SMTP Zoho Mail Integration.

SMTP2GO Constants

Constants available for the Gravity SMTP SMTP2GO Integration.

Resend Constants

Constants available for the Gravity SMTP Resend Integration.