WP Mail SMTP is a free, user-friendly plugin that ensures your WordPress site sends emails reliably by connecting to a proper email service via SMTP. The free version supports major providers like Gmail, SendGrid, Mailgun, and others, while WP Mail SMTP Pro unlocks advanced features like email logging, backup mailers, conditional routing, and real-time alerts. It includes a one-click migration tool from other SMTP plugins, integrates seamlessly with popular form builders, and offers a White Glove Setup service for hands-on configuration.
With strong security practices, multilingual support, and dedicated customer service, it’s the definitive solution for WordPress email deliverability.
SMTP WordPress Plugin
WP Mail SMTP is the most trusted WordPress plugin for fixing email deliverability issues, used by over 3 million websites to ensure critical emails reach their inbox. Developed by the team behind WPForms, it resolves the common problem of WordPress emails failing to send by replacing the default PHP mail() function with reliable SMTP (Simple Mail Transfer Protocol) delivery.
With a guided Setup Wizard, native integrations with top email services, and robust logging, WP Mail SMTP makes it easy for anyone to configure professional-grade email delivery for contact forms, password resets, notifications, and more.
WP Mail SMTP Plugin
By default, WordPress uses the PHP mail() function to send emails, which often fails or lands in spam folders due to lack of authentication and hosting restrictions. WP Mail SMTP solves this by reconfiguring your site to send emails through a trusted SMTP provider, adding authentication and encryption to dramatically improve deliverability.
The plugin is designed for simplicity. Its Setup Wizard guides you step-by-step through connecting your site to one of many supported mailers, including SendLayer (recommended), SMTP.com, Brevo (formerly Sendinblue), Gmail, Mailgun, SendGrid, Postmark, and more. For users on multisite networks, SMTP settings can be centrally managed at the network level.
Once configured, WP Mail SMTP ensures that all outgoing WordPress emails—such as registration confirmations, password resets, form notifications, and WooCommerce order updates—are sent securely and reliably. The plugin supports modern authentication methods and works even if your host blocks SMTP ports, thanks to API-based sending with supported providers.
WP Mail SMTP Pro
The free version includes everything needed for basic SMTP setup and reliable delivery. WP Mail SMTP Pro adds enterprise-level tools:
- Email Logging to archive, audit, and resend emails.
- Backup Connection that automatically switches to a secondary mailer if the primary fails.
- Smart Conditional Routing to send different types of emails (e.g., transactional vs. marketing) through different providers.
- Email Alerts via Slack, Discord, SMS (Twilio), or webhooks when emails fail.
- Rate Limiting to stay within your provider’s sending limits.
- Optimized Email Sending that queues emails in the background to prevent site slowdowns.
Supports & Integration
WP Mail SMTP is fully compatible with WordPress Multisite, allowing network admins to manage logs and settings across subsites. It integrates with tools like Action Scheduler, WooCommerce, and WP Rocket for seamless performance.
For users who need help, the plugin offers limited free support via the WordPress.org forums, while Pro users get world-class, one-on-one email support and access to the White Glove Setup service—where experts configure everything for you, including DNS records and mailer setup.
Regularly updated and security-focused, WP Mail SMTP follows best practices for data protection and is professionally translated into 12+ languages, including Spanish, French, German, and Japanese.
Features
Core (Free) Features:
- SMTP Configuration: Replace PHP
mail()with secure, authenticated SMTP delivery. - Easy Setup Wizard: Step-by-step guide to connect your site to a mailer.
- One-Click Migration: Automatically import settings from plugins like Easy WP SMTP, FluentSMTP, and Post SMTP.
- Multiple Mailer Support:
- SendLayer
- SMTP.com
- Brevo (Sendinblue)
- Gmail / Google Workspace
- Elastic Email
- Mailgun
- Mailjet
- SendGrid
- Postmark
- SparkPost
- SMTP2GO
- Microsoft (Outlook.com, Office 365)
- Amazon SES (Pro)
- Zoho Mail (Pro)
- Any other SMTP service
- Custom “From” Address & Name: Set a professional sender identity.
- Email Test Tool: Send a test email to verify your configuration works.
- Multisite Support: Network-wide settings and management.
- Translation Ready: Available in 12+ languages.
WP Mail SMTP Pro Features:
- Email Logging: Full archive of all sent emails with subject, recipients, content, headers, and attachments.
- Resend Emails: Manually resend failed or successful emails individually or in bulk.
- Backup Mailer: Automatically failover to a secondary provider if the primary fails.
- Smart Conditional Routing: Route emails based on subject, sender, recipient, or source plugin (e.g., send WooCommerce emails via SendGrid, admin alerts via Gmail).
- Email Alerts: Get notified via Slack, Discord, Microsoft Teams, SMS (Twilio), webhooks, or secure API when emails fail.
- Rate Limiting: Control how many emails are sent per minute/hour/day to avoid provider limits.
- Optimized Email Sending: Queue emails in the background to prevent site performance issues.
- Email Reports & Weekly Summary: Track delivery stats, open rates, and click-through rates (with tracking enabled).
- Track Opens & Clicks: Monitor engagement for critical notifications.
- Email Controls: Disable specific WordPress email types (e.g., update notifications) from being sent.
- White Glove Setup: Expert configuration service for SendLayer, Brevo, and SMTP.com.
- Dedicated Email Support: Priority one-on-one help for Pro users.
Security & Performance:
- Secure API Integrations: Use direct API calls (not SMTP) for better reliability and security.
- Improved Data Security: Enhanced encryption and handling of API keys and credentials.
- Action Scheduler Integration: Reliable, scalable background task processing.
- Regular Updates: Bi-monthly updates with new features, compatibility, and security patches.
Compatibility & Use Cases:
- Works with all major form plugins (WPForms, Contact Form 7, etc.).
- Essential for WooCommerce, membership, and LMS sites that rely on email notifications.
- Ideal for agencies managing multiple client sites.
WP Mail SMTP is the ultimate solution for ensuring your WordPress emails are delivered, tracked, and reliable—turning a common technical headache into a seamless, professional experience.
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