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Mail Queue

By WDM

Communication & Messaging / Transactional Email

Mail Queue Review - In-Depth Analysis

Control your WordPress emails with this plugin. Queue outgoing emails and receive alerts for unusual sending volumes.

Performance Overview

WPS Score

6.72/10

User Rating

5/5 (based on 8+ reviews)

Active Installations

1,000+

Update Frequency

Below Average It is calculated using the weighted average of same category plugins.

Security Score

1 / 10 (Very Low Risk) It is calculated using the weighted average of all versions.

What It Does

This plugin enhances the security and stability of your WordPress installation by delaying and controlling wp_mail() email submissions through a managed queue.

If your site exhibits unusual behavior, such as a spam bot repeatedly submitting forms, you will be alerted immediately and can optionally pause delivery automatically while you investigate.

Key features include intercepting wp_mail() to place outgoing messages in a queue, configuring how many emails are sent and at what interval, and logging queued emails, sent emails, alerts, and queue events.

You will receive alerts when the queue grows unexpectedly and can auto-pause the queue when an alert is triggered. Additionally, you can send selected queued emails immediately from the backend and prioritize WordPress password reset emails.

Stay informed with alerts when WordPress is unable to send emails, ensuring you maintain control over your email communications.

Comparing to Alternatives

Mail Queue stands out in its category with a strong focus on ease of use and reliable email queue management. While there are alternatives available, this plugin offers a unique blend of simplicity and effective functionality.

Top alternatives

GD Mail Queue ( WPS: 6.63)

Strengths

Extremely easy to configure and use
Excellent support from developers
Effectively speeds up SMTP email flow
Reliable batching of email sending
Responsive to feature requests and bug fixes

Weaknesses

No pro version with advanced features
Limited to basic mail queue functionality
Fewer customization options compared to some alternatives

User Sentiment Analysis

With a perfect 5-star rating from all reviewers, user feedback is overwhelmingly positive, highlighting ease of use and excellent support.

Positive highlights

'Easy to use.' — SONBEAT
'Good plugin. Easy to configure and use. Good support.' — kbiegert
'Works as a charm 👌. Highly recommend plugin for your websites.' — chickenme
'Does exactly what you want it to do and great support.' — Dave Pattern
'Best Mail Queue/Email Logging Plugin for WordPress. Developers are generous with support.' — codings

Common complaints

Weaknesses

Lacks advanced features found in premium plugins
Limited customization options
No paid version to access additional functionality

Who Should Use This?

Best for

Users seeking a straightforward, reliable mail queue plugin with excellent support and no need for advanced premium features will find Mail Queue ideal.

Not ideal for

Those requiring extensive customization, advanced email management features, or premium support options may find this plugin limiting.

Pricing & Value

Free version includes

The free version offers full mail queue functionality with easy setup and reliable performance, suitable for most users.

Final Verdict

Mail Queue excels as a simple, effective solution for managing email queues in WordPress, backed by excellent user reviews and responsive support. Its lack of vulnerabilities and high security rating add to its appeal.

While it lacks a pro version and some advanced features, it remains a top choice for users prioritizing ease of use and reliability over extensive customization. Alternatives like GD Mail Queue may offer different features but Mail Queue's strong user satisfaction makes it a compelling option.

Other Notable Features

Here are a few other notable features of this free Mail Queue plugin.

Email Log

Mail Queue

Screenshots

FAQ

Yes. Once activated, please go into the plugin settings and configure the queue for your website.

You can choose whether the Mail Queue should be Enabled, Paused, or Disabled, and you can control how many emails are sent and how often they should be sent.

You can also enable alerts, define the queue size threshold for alerts, and optionally enable automatic pausing when an alert is triggered.

Yes, you can add the custom X-Mail-Queue-Prio header set to High to your email. High priority emails are still processed through the normal Mail Queue cycle, but they are sent before normal queued emails.

Example 1 (add priority to WooCommerce emails):

add_filter('woocommerce_mail_callback_params',function ( $array ) {     $prio_header = 'X-Mail-Queue-Prio: High';     if (is_array($array[3])) {         $array[3][] = $prio_header;     } else {         $array[3] .= $array[3] ? "\r\n" : '';         $array[3] .= $prio_header;     }     return $array; },10,1);

Example 2 (add priority to Contact Form 7 form emails):

When editing a form in Contact Form 7 just add an additional line to the
Additional Headers field under the Mail tab panel.

X-Mail-Queue-Prio: High

Yes, this is possible (if you absolutely need to do this).

For this you can add the custom X-Mail-Queue-Prio header set to Instant to your email. These emails are sent immediately and bypass the queue. They still appear in the Mail Queue log so that their delivery remains visible.

Mind that this is a potential security risk and should be considered carefully. Please use only as an exception.

Example 1 (instantly send WooCommerce emails):

add_filter('woocommerce_mail_callback_params',function ( $array ) {     $prio_header = 'X-Mail-Queue-Prio: Instant';     if (is_array($array[3])) {         $array[3][] = $prio_header;     } else {         $array[3] .= $array[3] ? "\r\n" : '';         $array[3] .= $prio_header;     }     return $array; },10,1);

Example 2 (instantly send Contact Form 7 form emails):

When editing a form in Contact Form 7 just add an additional line to the
Additional Headers field under the Mail tab panel.