Description
WordPress emails landing in the spam folder, or worse, not delivering at all.
That’s the common scenario among WordPress site owners.
By default, WordPress uses the standard PHP mail function to send emails, which is notoriously unreliable and frequently blocked by major email clients.
SendGrail SMTP solves this problem permanently and without charging you a penny. YES! SendGrail is 100% free with no paid option at all.
SendGrail completely reconfigures how your WordPress site sends out emails. By routing your outgoing messages through dedicated, trusted SMTP (Simple Mail Transfer Protocol) providers, we ensure that your password resets, WooCommerce receipts, and contact form submissions reach your users’ inboxes every single time.
Designed for both beginners and advanced users, SendGrail combines a streamlined, one-click setup with powerful enterprise-grade tools like automatic failover routing and real-time delivery logs.
Core Features
- Multiple SMTP Providers: Connect seamlessly with the most popular and reliable email delivery services including SendGrid, Mailgun, Amazon SES, Postmark, Google (Gmail/Workspace), Microsoft (Outlook/Office 365), and any standard custom SMTP server.
- Automatic Fallback Routing: Never lose an important email. If your primary SMTP provider experiences downtime or fails to send a message, SendGrail automatically attempts to resend using a secondary backup provider.
- Detailed Email Logging: Keep a complete record of every email sent from your website with delivery status details and timestamps.
- Secure Credentials: Define credentials directly in wp-config.php for security.
- One-Click Setup: Guided setup wizard for quick configuration.
- Advanced Debug Mode: View detailed logs to troubleshoot connection issues.
- Multisite Support: Manage settings centrally or per sub-site.
SMTP Mailers
SendGrail SMTP has a bunch of popular mailers to make sure your emails are delivered correctly.
- Google Workspace
Read the Google Workspace documentation - Microsoft Outlook
Read the Microsoft Outlook documentation - Brevo (formerly Sendinblue)
Read the Brevo documentation - Mailgun
Read the Mailgun documentation - SendGrid
Read the SendGrid documentation - Amazon SES
Read the Amazon SES documentation - Postmark
Read the Postmark documentation - Mailjet
Read the Mailjet documentation - SendGrid
Read the SendGrid documentation - Netcore
Read the Netcore documentation - Elastic Email
Read the Elastic Email documentation - SendLayer
Read the SendLayer documentation - SparkPost
Read the SparkPost documentation - Resend
Read the Resend documentation - Zoho Mail
Read the Zoho Mail documentation - SMTP2Go
Read the SMTP2Go documentation - Mandgrill
Read the Mandgrill documentation - Custom (Add your own)
Read the Custom SMTP documentation
Screenshots
SendGrail – Getting Started 
SendGrail – Choose Your Mail Provider 
SendGrail – Dark Theme 
SendGrail – Dashboard 
SendGrail – Email Provider Connections 
SendGrail – Email Routes 
SendGrail – Email Logs 
SendGrail – Email Delivery Reports 
SendGrail – Notifications
Installation
Installing SendGrail SMTP is quick and straightforward.
Installation from the WordPress Dashboard:
- Navigate to Plugins > Add New in your WordPress admin dashboard.
- Search for
SendGrail SMTP. - Click Install Now and then click Activate.
- Go to the new SendGrail menu in your dashboard sidebar to launch the setup wizard and configure your SMTP provider.
Manual Installation via FTP:
- Download the plugin ZIP file to your computer and extract it.
- Connect to your website server using your preferred FTP client.
- Upload the extracted
sendgrailfolder to the/wp-content/plugins/directory on your server. - Log in to your WordPress dashboard, navigate to Plugins > Installed Plugins, and click Activate next to SendGrail SMTP.
- Navigate to the SendGrail settings page to enter your provider credentials.
FAQ
-
Does SendGrail work with my existing contact form plugin?
-
Yes! SendGrail seamlessly integrates with all major WordPress form plugins, including Contact Form 7, WPForms, Gravity Forms, Ninja Forms, and Fluent Forms. Once SendGrail is active, it automatically takes over email delivery for the entire site.
-
Will this fix WooCommerce emails going to spam?
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Absolutely. WooCommerce relies on the standard WordPress email system. By routing these transactional emails (like order receipts and shipping notifications) through a proper SMTP provider via SendGrail, your delivery rates will drastically improve.
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What happens if my main email provider goes down?
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If you have configured Fallback Routing, SendGrail will instantly detect the failure and attempt to send the email using your designated backup provider. This ensures your critical emails are still delivered even during service outages.
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Do I need a paid email provider to use this plugin?
-
No, it is not mandatory. While we support premium transactional providers like SendGrid and Amazon SES, you can also connect a free Gmail account, a standard cPanel webmail account, or any other free SMTP service you prefer.
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Is my email data secure when logging is turned on?
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Yes. Your email logs are stored securely in your own WordPress database. We do not transmit your email content to any third-party servers. You also have the option to routinely auto-delete older logs to save database space.
Reviews
There are no reviews for this plugin.
Contributors & Developers
“SendGrail SMTP – Secure Email Delivery, Routing & Email Log for Gmail, Outlook, Office 365 & Custom SMTP” is open source software. The following people have contributed to this plugin.
Contributors
Interested in development?
Browse the code, check out the SVN repository, or subscribe to the development log by RSS.
Changelog
1.0.0
- Initial release on the WordPress Plugin Repository.
- Introduced core SMTP routing capabilities.
- Added support for standard SMTP, Gmail, Outlook, SendGrid, and Mailgun.
- Implemented Email Logging and Debug Mode features.
- Added Fallback Routing logic for automated failovers.