Post SMTP Pro

What problem Post SMTP Pro solves

By default, WordPress sends emails through PHP's mail() function, a method that most hosting providers don't authenticate properly, causing order notifications, contact form submissions or password resets to end up in spam or simply never arrive. Post SMTP Pro fixes this by routing your site's outgoing email through trusted SMTP servers or APIs (Gmail, Microsoft 365, Amazon SES, SendGrid, Brevo, Mailgun, Zoho and more than twenty additional providers), significantly improving actual inbox delivery rates.

How setup works

The plugin includes a wizard that narrows the mail provider connection down to three steps: choosing the mailer, entering the sending details (credentials or API keys), and sending a test email to confirm everything works. For the most popular providers, Post SMTP Pro supports OAuth 2.0 authentication, letting you connect Gmail, Microsoft 365, Amazon SES or Zoho without storing SMTP passwords in the database, which reduces the security risk.

Logging and monitoring every email sent

One of the most useful features of Post SMTP Pro is its detailed email logs. Every message sent from the site is logged with its delivery status, subject, recipient, message body, attachments and error message if something goes wrong. From that same screen you can resend failed emails with one click, filter logs by status, date or recipient, and export them to CSV for further analysis.

Alerts and automatic recovery from failures

When a send fails, Post SMTP Pro doesn't just log it: it can notify the admin immediately by email, Slack, Microsoft Teams, SMS (via Twilio), webhooks to external services, or through its Chrome extension and mobile app. It also lets you configure automatic retries with a set limit, so the email keeps trying until it's delivered, and offers the option to set up a backup mailer (backup SMTP) that kicks in if the primary provider fails.

Performance reports and mobile app

The plugin generates periodic reports (daily, weekly or monthly) with charts showing emails sent, delivered, failed and opened, making it easier to spot deliverability problems before they affect customers or users. The dedicated mobile app complements this by letting you review logs, receive push notifications about errors, resend failed emails and manage multiple WordPress sites from a single dashboard, without needing to log into the WordPress backend.

What kind of projects Post SMTP Pro fits

• WooCommerce stores that depend on order confirmations, invoices and shipping notifications being delivered without failures.
• Agencies and developers managing multiple sites who need to monitor email from a single point, including compatibility with WordPress Multisite.
• Sites with contact forms, memberships or password recovery, where a lost email means a lost user.
• Businesses already using Microsoft 365, Google Workspace or another corporate provider that need secure API authentication instead of traditional SMTP credentials.

Frequently asked questions

Do I need coding skills to set it up?

No. The setup wizard walks you step by step through connecting your WordPress site to the mail provider you choose, with no need to touch any code.

Does Post SMTP Pro slow down the site?

It shouldn't, since email sending is processed asynchronously in the background, without blocking page loading for visitors.

Does it work with WooCommerce?

Yes. It ensures that WooCommerce transactional emails, such as order confirmations, receipts and shipping updates, are delivered reliably.

Can I use my own SMTP server instead of a well-known provider?

Yes, the custom SMTP option lets you enter the details of any private or third-party SMTP server.

Is it compatible with Multisite installations?

Yes, it can be set up centrally for the whole network or individually on each site in the installation.