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How To Integrate and Configure Post SMTP on Your WordPress Site


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This is a guest post by, the creators of the Post SMTP plugin.

If you’re looking for a comprehensive guide to integrate and configure Post SMTP on your WordPress site, look no further. Setting up and configuring Post SMTP on WordPress is a critical part of sending emails from your site, whether trying to establish an automated system for sending emails or simply seeking to ensure your server operates smoothly. However, the process can be time-consuming and complicated, particularly if you are not familiar with it.

Unlocking the Power of SMTP on Your WordPress: A Simple 3-Step Guide!

  • Step 1: Install and Activate the Post SMTP Plugin
  • Step 2: Configure Mail SMTP Settings
  • Step 3: Test the Configuration by Sending an Email

This guide provides complete instructions to configure Post SMTP on WordPress. Furthermore, it also contains some troubleshooting tips to help you overcome any challenges that may arise along the way. Regardless of your experience level, you can successfully integrate and configure Post SMTP on WordPress with this guide.

What is a SMTP Plugin?

A Post SMTP plugin for WordPress serves as a useful tool that allows for the seamless sending of email from a WordPress website. By linking a website to an external SMTP server, such plugins provide enhanced security and reliability. Users can configure SMTP settings such as the host, encryption method, port, and authentication credentials.

Post SMTP is a modern SMTP plugin for WordPress that significantly improves email deliverability. Its ease of installation and usage and its reliability have earned it the trust of over 300,000 users worldwide. Post SMTP Mailer goes beyond the conventional SMTP plugins and actively contributes to email authentication, ensuring that emails are delivered promptly and do not end up in spam folders or remain undelivered.

The Highlights of Post SMTP

  • Post SMTP has an intelligent setup wizard that guides you from launch to testing emails.
  • The Email log (built-in) is a valuable resource for detecting problems with emails.
  • The connection test scans your SMTP server to look for firewall blocks and remove incorrect configurations.
  • Post SMTP offers Zoho Mail – equipped with advanced features like email logs, OAuth 2.0 protocol, and fallback mailing. 
  • OAuth 2.0 increases the security and protection of email passwords by discouraging storing your email password in the WordPress database.

Integrating SMTP Plugin with a WordPress Site – The Workflow

Configuring Post SMTP on your WordPress website may seem daunting, but it is fairly straightforward. The initial step is establishing an SMTP server from a reputable provider that offers dependable service and servers located in suitable geographic areas for swift email delivery.

After selecting an SMTP server, configure your WordPress site to utilize it as the mailer by entering the SMTP server information, including the hostname, port, and authentication data, in the WordPress administrative dashboard. Ensuring the authentication protocol is secure to safeguard your username and password is crucial. 

Take an example of the Post SMTP plugin here for setup purposes:


Step 1: Install and Activate the Mail SMTP Plugin

First, log in to your WordPress dashboard. Then, navigate to the “Plugins” section and click “Add New.” In the search bar, type “SMTP plugin” or the name of the specific plugin you want to install.  For this example, we’ll use the POST SMTP Plugin.

Once you find the plugin you want to use, click on the “Install Now” button and then “Activate.”


Once installed and activated, this plugin streamlines the process of securely sending emails from your WordPress site with just a few clicks.

Upon completing the installation of the Post SMTP plugin, it is imperative to enter the required information, such as the email address, password, and other relevant settings as prompted by the plugin. After configuring these settings, sending emails from your WordPress website should be seamless and uninterrupted.

Pro Tip:  In the event of any confusion or difficulty during the process, you can seek guidance by perusing tutorials and videos available online or by contacting the developers of the Post-SMTP Plugin for further support.

Looking for more information about SMTP and emails? Check out these links:

Step 2: Configure Mail SMTP Settings

Configuring Post SMTP can be complex, as it often requires advanced knowledge of WordPress functions and programming. For those who feel uncomfortable with coding or troubleshooting potential errors, it is advisable to seek the assistance of a professional web developer.

If you’re comfortable with setting it up yourself, here is a step-by-step guide on how to configure Post SMTP on your WordPress website:

  • Setup Wizard – Start the process by clicking on the setup wizard button. This will take you through the following steps:
  • Import Configuration – If you have an existing configuration with another WordPress plugin, you can use those settings for the Setup Wizard.
  • Sender Details – Enter your desired name and email address.
  • Hostname of Outgoing Mail Server – This is the Outgoing SMTP, or Mail Submission Agent (MSA), to which Postman delegates mail delivery.
  • Connectivity Test – Connection settings will depend on your email service provider’s offerings and what your WordPress host permits.
  • Authentication – Enter your Client Secret and Client ID.
  • Notification – Choose a notification service to use whenever delivery fails (Pushover, Email, or Slack).
  • Finish – Post-SMTP will ensure your plugin settings have been appropriately configured.


By following the aforementioned steps, one can seamlessly integrate and configure Post SMTP on their WordPress website. This can significantly enhance the credibility and professionalism of their website while ensuring the security and reliability of their email correspondence.

Step 3: Test the Configuration by Sending an Email

Ensuring your configuration is properly set up and tested before utilizing your WordPress site’s email capabilities is decisive. To accomplish this, you can use the SMTP mailer plugin to send a test email by inputting the credentials you have added in the settings and clicking the “Save Changes” button.

After saving your configuration, you can use the “Send Test Email” option to confirm that the connection has been set up correctly. If the email was sent successfully, you will receive a confirmation message. In case of an error, review your SMTP settings to ensure they are correct.

Here is a more detailed guide on how to send a test email via the Post SMTP plugin:

    • Choose the email recipient – Enter the email address of the intended test email recipient.
    • Send the message – Send the test email and review its status.
  • Session Transcript – Review the transcript of the test email session to diagnose any issues.


Importance of Email Delivery Failure Notification

Ensuring email delivery is critical in today’s digital age, where communication happens mostly over email. However, sometimes, messages fail to reach their intended recipients due to various reasons. In such cases, email delivery failure notifications provide valuable feedback to the sender about the status of their message.

When an email is sent, it goes through multiple stages before it reaches the recipient’s mailbox. During each stage, several factors can cause the message to fail, such as invalid email addresses, network issues, or spam filters. When a message fails to reach its intended recipient, the sender receives an email delivery failure notification. These notifications contain details about the failed message, including the reason for failure and any associated error codes.


It is important to ensure that email delivery failure notifications are enabled to receive valuable feedback about the status of a sent message. Email delivery failure notifications can also help to prevent the sender’s email account from being flagged as spam or blacklisted, which can negatively impact their reputation and result in their messages being blocked by email servers. Post SMTP offers various ways in which a user can get email delivery failure notifications:

These methods provide a convenient and reliable way to receive notifications about failed email deliveries, enabling the sender to quickly address any issues and improve their email delivery success rates.

Email Logs (Bonus Feature)

The Email Logs feature in Post SMTP is an essential tool for tracking the delivery of sent emails. By keeping a complete record of email deliveries to the mail server, the email logs feature provides users with valuable insights into the status of their outgoing emails.

The migration log feature provides significant benefits for email administrators. It helps them identify and resolve email delivery issues by monitoring emails the intended recipients have not received. With this information, administrators can address the problem and ensure the email is delivered successfully.

By analyzing the data in the log, administrators can identify trends in email traffic and patterns of message delivery. This information can be used to optimize the server’s performance and efficiency, leading to improved email delivery and reduced downtime.


Wrapping Up

Integrating and configuring Mail SMTP on your WordPress website can provide numerous advantages, such as enhanced deliverability and improved security. In this guide, we walked through a comprehensive, step-by-step process for setting up and configuring your WordPress Mail SMTP, including integrating necessary plugins. By following these steps, you can ensure your WordPress Mail SMTP is adequately configured and functioning optimally.

Get started with Post SMTP today and take advantage of its benefits for your WordPress website’s email functionality. Download the plugin and follow our step-by-step guide to configure it with ease. Improve your email deliverability, security, and reliability by using Post SMTP for WordPress.

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