Constants

Standard Constants

Reference documentation for the CONSTANTS that are provided with the plugin but are not related to any specific integration.

Articles

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.

Postmark Constants

Constants available for the Postmark Integration.

SendGrid Constants

Constants available for the SendGrid Integration.

Zoho Mail Constants

Constants available for the Gravity SMTP Zoho Mail Integration.