Filters
Discover the different filter hooks available within Gravity SMTP. You can use filters to modify data to better match your particular needs.
Actions
Learn about the different action hooks available within Gravity SMTP. Action hooks allow you to perform additional actions when an event takes place.
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.
Amazon SES
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Amazon SES (Simple Email Service).
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
Integrations
Elastic Email
This section contains all articles specifically related to integrating your Gravity SMTP setup with Elastic Email
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.
Emailit
This section contains all articles specifically related to integrating your Gravity SMTP setup with Emailit
Google / Gmail
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Google / Gmail to send transactional emails.
Mailchimp Transactional
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Mailchimp Transactional.
MailerSend
This section contains all articles specifically related to integrating your Gravity SMTP setup with MailerSend
Mailgun
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Sinch Mailgun mail sending service.
Mailjet
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Mailjet 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.
Resend
This section contains all articles specifically related to integrating your Gravity SMTP setup with Resend
SendGrid
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Twilio Sendgrid mail sending service.
SMTP2GO
This section contains all articles specifically related to integrating your Gravity SMTP setup with SMTP2GO
SparkPost
This section contains all articles specifically related to integrating your Gravity SMTP setup with the SparkPost sending service.
Zoho Mail
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Zoho Mail sending service.
Articles
Microsoft 365 / Outlook Settings Reference
This quick reference guide lists all the settings related to the Microsoft 365 / Outlook integration within Gravity SMTP and provides a short description of their purpose.
Mailgun Settings Reference
This quick reference guide lists all settings related to the Mailgun integration in Gravity SMTP and briefly describes their purpose.
Google / Gmail Settings Reference
This quick reference guide lists all the settings related to the Google / Gmail integration within Gravity SMTP and provides a short description of their purpose.
Amazon SES Settings Reference
This quick reference guide lists all the settings related to the Amazon SES integration within Gravity SMTP and provides a short description of their purpose.
Adding and Authenticating a Domain in Mailchimp Transactional
This article outlines steps for adding and verifying a domain in your Mailchimp Transactional account.
Obtaining your Mailchimp Transactional API Key
This article outlines steps for generating a new API key in your Mailchimp Transactional account.
Connecting to the Mailchimp Transactional Email Service
Overview of Mailchimp Transactional Integration settings and connection instructions.
Mailchimp Transactional Settings Reference
This quick reference guide lists all the settings related to the Mailchimp Transactional integration within Gravity SMTP and provides a short description of their purpose.
PHP Mail Constants
Constants available for the PHP Mail integration.
Connecting to Amazon SES
This article guides you through integrating Gravity SMTP with your Amazon SES account.