SendGrail SMTP – Secure Email Delivery, Routing & Email Log for Gmail, Outlook, Office 365 & Custom SMTP

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.

1. Google Workspace Read the Google Workspace documentation
2. Microsoft Outlook Read the Microsoft Outlook documentation
3. Brevo (formerly Sendinblue) Read the Brevo documentation
4. Mailgun Read the Mailgun documentation
5. SendGrid Read the SendGrid documentation
6. Amazon SES Read the Amazon SES documentation
7. Postmark Read the Postmark documentation
8. Mailjet Read the Mailjet documentation
9. SendGrid Read the SendGrid documentation
10. Netcore Read the Netcore documentation
11. Elastic Email Read the Elastic Email documentation
12. SendLayer Read the SendLayer documentation
13. SparkPost Read the SparkPost documentation
14. Resend Read the Resend documentation
15. Zoho Mail Read the Zoho Mail documentation
16. SMTP2Go Read the SMTP2Go documentation
17. Mandgrill Read the Mandgrill documentation
18. Custom (Add your own) Read the Custom SMTP documentation