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Free Plugin by Casey v1.3.4.1

Simple SMTP

Adds a simple mail configuration panel into your WordPress installation. Supports temporary logging and config variables.

Simple SMTP

The facts

Rating
5★ from 11
Active installs
2k+
Price
Free
Last updated
11 Aug 2025
Added
Mar 2020
Requires WP
5.0
Tested up to
WP 6.8.8
Requires PHP
7.0
Downloads
35,365

Our analysis

AI-assisted

Simple SMTP is a WordPress plugin that allows you to configure custom SMTP settings for your site. This is particularly useful for hosting environments that do not support the default PHP mail functionality. The plugin includes a logging feature that provides a 30-day overview of sent emails, which can be enabled in the settings panel.

The plugin supports various SMTP parameters, including host, port, authentication, and security methods. It also allows for environmental and constant overriding, making it suitable for deployment scenarios. This plugin is ideal for users who need reliable email delivery from their WordPress site.

Best for: This plugin is best for WordPress users needing to configure SMTP settings for reliable email delivery.

What it does well

  • ✓Provides custom SMTP settings for WordPress
  • ✓Includes email logging for 30 days
  • ✓Supports environmental and constant overriding
  • ✓Compatible with PHP 7.0 and above
  • ✓Tested up to WordPress version 6.8.8

Where it falls short

  • •Limited feature information available
  • •No support for permanent email logging without additional steps

Verdict

Simple SMTP offers essential features for managing email delivery in WordPress. It is a straightforward solution for users with specific SMTP requirements.

From the developer

Casey's own description of Simple SMTP, lightly tidied.

Adds a simple, no-fuss SMTP settings to your WordPress installation that lets you define custom settings, which is especially useful for hosts with no control over the php mail functionality.

If logging is enabled, a new segment in the settings panel will show up with a 30-day overview of recent emails, and will automatically prune older logs. Please see the FAQ if you want a more permanent solution.

For more information, please see the project wiki on GitHub.

Environment and constant overriding (optional)

This plugin will prefer environmental and constant-stored values over the plugin-saved equivalent settings, making it easier to use this plugin via deployment.

These can be either stored in your systems env setup, or in wp-config.php as define( 'SEE_BELOW', 'your_value_here' );.

Accepted Parameters

  • SMTP_HOST (string) Mail server hostname.
  • SMTP_PORT (integer) Port address (usually 25, 465 or 587).
  • SMTP_AUTH (integer, 1 or 0) Pass below credentials to your mail server.
  • SMTP_USER (string) The mail username for this account.
  • SMTP_PASS (string) The password for the mailer account.
  • SMTP_FROM (string) Enforce all emails come from this email address.
  • SMTP_FROMNAME (string) Enforce all emails to have a certain email name.
  • SMTP_SEC (string) Use a particular email security method (accepts ‘def’ (default), ‘ssl’, ‘tls’ and ‘off’).
  • SMTP_NOVERIFYSSL (boolean) Disable validation of the SMTP server certificate (not recommended).
  • SMTP_LOG (boolean) Controls the logging capability and visibility.
  • SMTP_DISABLE (boolean) Disables the mailer. They will still be logged if enabled, but won’t send out.

It is recommended to store at least SMTP_PASS in your wp-config.php file (with the correct file permissions set). If the openssl extension is available, the plugin will attempt to encrypt the password in the database.

Read the full description on the official page →

Tagged as

purpose SMTP & Transactional Email
topic Email Mail Logging Add Support Emails Disable

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