Mailtrap
This section contains all articles specifically related to integrating your Gravity SMTP setup with Mailtrap.
Cloudflare Email
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Cloudflare Email Service.
SMTP.com
This section contains all articles specifically related to integrating your Gravity SMTP setup with the SMTP.com Service.
Getting Started
Introduction
A collection of guides that explain what Gravity SMTP is, how it works, and how to set it up for the first time after installation.
Filters
Discover the different filter hooks available within Gravity SMTP. You can use filters to modify data to better match your particular needs.
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.
Constants
This category contains a list of the constants that can be set within the wp-config.php file of your WordPress installation.
Brevo
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Brevo mail sending service.
User Guides
Dashboard And Logs
Learn how to navigate the Gravity SMTP dashboard and review all email related activity, including logs, tracking email and details.
Actions
Learn about the different action hooks available within Gravity SMTP. Action hooks allow you to perform additional actions when an event takes place.
Integrations
Monitoring
Configure ralerts and monitoring tools that notify you when email delivery issues occur.
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.
Tools And Settings
Explore the available tools, system utilities, and configuration options for managing Gravity SMTP, diagnosing issues, and controlling how your site sends email.
Emailit
This section contains all articles specifically related to integrating your Gravity SMTP setup with Emailit
Uncategorized
Reference
Access version history, update instructions, and reference materials for frequently asked questions and product changes.
Google / Gmail
This section contains all articles specifically related to integrating your Gravity SMTP setup with the Google / Gmail to send transactional emails.
Troubleshooting
Improve email deliverability with recommended best practices and access troubleshooting resources for resolving common problems.
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
gravitysmtp_attachment_uploads_dir_path
The gravitysmtp_attachment_uploads_dir_path filter lets you customize the directory path where Gravity SMTP saves email attachments.
gravitysmtp_notifications_email_digest_frequency_options
The gravitysmtp_notifications_email_digest_frequency_options filter lets developers customize the available frequency options for the email activity digest.
gravitysmtp_on_send_failure
The gravitysmtp_on_send_failure action allows you to perform custom logic when email sending fails, such as logging, notifications, or cleanup operations.
gravitysmtp_connector_for_sending
This gravitysmtp_connector_for_sending filter lets you dynamically choose which SMTP connector should handle a specific email.
gravitysmtp_before_email_send
Fires before an email is sent through Gravity SMTP. This action allows you to perform custom logic before the email sending process begins.
gravitysmtp_sparkpost_send_as_transactional
This filter allows you to control whether emails sent through SparkPost are marked as transactional. It lets you override the default behavior of sending emails as transactional messages.
Email Activity Digest
This article explains the Email Activity Digest, an email summary of site email activity, and shows how to configure its settings for delivery frequency and previews.
Adding and Authenticating a Domain in Resend
Adding and verifying a sending domain inside your Resend account is mandatory before you can start relaying messages through the Gravity SMTP Resend Integration.
Obtaining your Resend API Key
This article outlines steps for generating a new API key from within your Resend account.
Connecting to Resend
This article shows you the steps required to integrate Gravity SMTP with Resend.