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WP Mail SMTP by WPForms – The Most… vs Site Mailer – SMTP Replacement, Email… (2026)

Detailed side-by-side comparison of two WordPress plugins, based on real-time data from WordPress.org.

WP Mail SMTP by WPForms – The Most…

WP Mail SMTP by WPForms – The Most…

4.8(5,089)

4.0M+ active installs

Free

Updated 4 months ago
View WP Mail SMTP by WPForms – The Most…
VS
Site Mailer – SMTP Replacement, Email…

Site Mailer – SMTP Replacement, Email…

2.2(14)

200K+ active installs

Free

Updated 1 month ago
View Site Mailer – SMTP Replacement, Email…

Quick Verdict

As of April 2026, WP Mail SMTP by WPForms – The Most… has a higher user rating (4.8/5 from 5,089 reviews) and leads in active installations (4.0M+ vs 200K+). Both are free WordPress plugins. WP Mail SMTP by WPForms – The Most… has accumulated 76M+ total downloads while Site Mailer – SMTP Replacement, Email… has 1.8M+. Site Mailer – SMTP Replacement, Email… has a higher support resolution rate (100% vs 88%).

Detailed Comparison

Rating
4.8/5WP Mail SMTP by WPForms – The Most…
◄
Site Mailer – SMTP Replacement, Email…2.2/5
Total Reviews
5,089WP Mail SMTP by WPForms – The Most…
◄
Site Mailer – SMTP Replacement, Email…14
Active Installs
4.0M+WP Mail SMTP by WPForms – The Most…
◄
Site Mailer – SMTP Replacement, Email…200K+
Total Downloads
76M+WP Mail SMTP by WPForms – The Most…
◄
Site Mailer – SMTP Replacement, Email…1.8M+
Support Resolution
88%WP Mail SMTP by WPForms – The Most…
►
Site Mailer – SMTP Replacement, Email…100%
Last Updated
4 months agoWP Mail SMTP by WPForms – The Most…
►
Site Mailer – SMTP Replacement, Email…1 month ago
First Released
2007WP Mail SMTP by WPForms – The Most…
Site Mailer – SMTP Replacement, Email…2024
Age
19 yearsWP Mail SMTP by WPForms – The Most…
Site Mailer – SMTP Replacement, Email…2 years
WP Requires
5.5+WP Mail SMTP by WPForms – The Most…
Site Mailer – SMTP Replacement, Email…6.6+
PHP Requires
7.4+WP Mail SMTP by WPForms – The Most…
Site Mailer – SMTP Replacement, Email…7.4+
Business Model
FreeWP Mail SMTP by WPForms – The Most…
Site Mailer – SMTP Replacement, Email…Free
Latest Version
4.7.1WP Mail SMTP by WPForms – The Most…
Site Mailer – SMTP Replacement, Email…1.4.3

Rating Breakdown

WP Mail SMTP by WPForms – The Most…

4.8/5(5,089 reviews)
5
94%
4
1%
3
1%
2
1%
1
3%

Site Mailer – SMTP Replacement, Email…

2.2/5(14 reviews)
5
29%
4
0%
3
0%
2
7%
1
64%

Recent Reviews

WP Mail SMTP by WPForms – The Most… Reviews

by marenaso

Great plugin!

Easy to install and configure. Works like a charm!

by dome0013

Love it

easy and reliable

by janell12

Does the Job, Needs Improvement

WP Mail SMTP by WPForms works well for email delivery, with easy setup. However, it lacks some advanced features and customization. 4 stars! This topic was modified 2 days, 1 hour ago by janel

Site Mailer – SMTP Replacement, Email… Reviews

by petralearnsword

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

by Chris

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

by Svensonsan

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

Frequently Asked Questions

Is WP Mail SMTP by WPForms – The Most… or Site Mailer – SMTP Replacement, Email… more popular?
WP Mail SMTP by WPForms – The Most… has 4.0M+ active installations while Site Mailer – SMTP Replacement, Email… has 200K+. WP Mail SMTP by WPForms – The Most… is the more widely-used plugin as of April 2026.
Which has better ratings — WP Mail SMTP by WPForms – The Most… or Site Mailer – SMTP Replacement, Email…?
WP Mail SMTP by WPForms – The Most… has a 4.8/5 rating from 5,089 reviews, while Site Mailer – SMTP Replacement, Email… has a 2.2/5 rating from 14 reviews.
Are WP Mail SMTP by WPForms – The Most… and Site Mailer – SMTP Replacement, Email… free?
WP Mail SMTP by WPForms – The Most… is free and Site Mailer – SMTP Replacement, Email… is free. Both can be downloaded from the WordPress.org plugin directory.
Which plugin has better support — WP Mail SMTP by WPForms – The Most… or Site Mailer – SMTP Replacement, Email…?
As of April 2026, WP Mail SMTP by WPForms – The Most… has a 88% support resolution rate while Site Mailer – SMTP Replacement, Email… has a 100% rate.
Which plugin is updated more frequently?
WP Mail SMTP by WPForms – The Most… was last updated 4 months ago and Site Mailer – SMTP Replacement, Email… was last updated 1 month ago.

Plugin data sourced from WordPress.org. Comparison and analysis by PluginSift.