Site Mailer – SMTP Replacement, Email… vs Mailgun for WordPress (2026)
Detailed side-by-side comparison of two WordPress plugins, based on real-time data from WordPress.org.
Site Mailer – SMTP Replacement, Email…
200K+ active installs
Free
Quick Verdict
As of April 2026, Mailgun for WordPress has a higher user rating (3.8/5 from 48 reviews) while Site Mailer – SMTP Replacement, Email… leads in active installations (200K+ vs 80K+). Both are free WordPress plugins. Site Mailer – SMTP Replacement, Email… has accumulated 1.8M+ total downloads while Mailgun for WordPress has 2.6M+. Site Mailer – SMTP Replacement, Email… has a higher support resolution rate (100% vs 0%).
Detailed Comparison
| Metric | Site Mailer – SMTP Replacement, Email… | Mailgun for WordPress | |
|---|---|---|---|
| Rating | 2.2/5 | ► | 3.8/5 |
| Total Reviews | 14 | ► | 48 |
| Active Installs | 200K+ | ◄ | 80K+ |
| Total Downloads | 1.8M+ | ► | 2.6M+ |
| Support Resolution | 100% | ◄ | 0% |
| Last Updated | 1 month ago | ◄ | 2 months ago |
| First Released | 2024 | 2012 | |
| Age | 2 years | 14 years | |
| WP Requires | 6.6+ | 5.6+ | |
| PHP Requires | 7.4+ | 7.4+ | |
| Business Model | Free | Free | |
| Latest Version | 1.4.3 | 2.1.10 |
Rating Breakdown
Site Mailer – SMTP Replacement, Email…
Mailgun for WordPress
Download Trends
Over the past 30 days, Site Mailer – SMTP Replacement, Email… averaged approximately 2,033 daily downloads while Mailgun for WordPress averaged 573.
Recent Reviews
Site Mailer – SMTP Replacement, Email… Reviews
Site Mailer Glitch
I’ve been using Site Mailer for a while now. But I installed it for a new client and the plugin is not working. “Sorry there was a glitch. Try refreshing the page. if that does not resolve the issue t
it forces you to set a Reply-To address
I’m unfortunately not satisfied with Site Mailer because it forces you to set a Reply-To address in the plugin settings. There is no option to leave this field empty. For websites that use advanced
Installed without my consent
This plugin suddenly appeared on my site without me ever installing it. I can only assume it was pushed through an Elementor update, which is completely unacceptable behavior. Plugins should never
Mailgun for WordPress Reviews
Simple, Reliable, and Honest
I’ve seen the negative reviews, but honestly my experience has been the opposite: the plugin just works, exactly as it should. Updates are rare, but that’s simply because the plugin is straightforward
Better than ever
I’ve been using this plugin for 5+ years now, and I’ve hardly ever experienced an issue. It allows me to easily use Mailgun to send emails on the WordPress sites I manage, and it’s always done its job
Sends email from WordPress via Mailgun service, that’s all, does it well.
Mailgun is an email delivery service aimed at sending transactional email for software developers. If you are not already using Mailgun to send email, then you don’t need or want this plugin. If you d
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Frequently Asked Questions
Is Site Mailer – SMTP Replacement, Email… or Mailgun for WordPress more popular?
Which has better ratings — Site Mailer – SMTP Replacement, Email… or Mailgun for WordPress?
Are Site Mailer – SMTP Replacement, Email… and Mailgun for WordPress free?
Which plugin has better support — Site Mailer – SMTP Replacement, Email… or Mailgun for WordPress?
Which plugin is updated more frequently?
Plugin data sourced from WordPress.org. Comparison and analysis by PluginSift.