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FluentSMTP – WP SMTP Plugin with Amazon… vs Kaigai Spam Mail Blocker (2026)

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

FluentSMTP – WP SMTP Plugin with Amazon…

FluentSMTP – WP SMTP Plugin with Amazon…

4.8(365)

500K+ active installs

Free

Updated 3 months ago
View FluentSMTP – WP SMTP Plugin with Amazon…
VS
Kaigai Spam Mail Blocker

Kaigai Spam Mail Blocker

0(0)

0 active installs

Free

Updated 2 months ago
View Kaigai Spam Mail Blocker

Quick Verdict

As of April 2026, FluentSMTP – WP SMTP Plugin with Amazon… has a higher user rating (4.8/5 from 365 reviews) and leads in active installations (500K+ vs 0). Both are free WordPress plugins. FluentSMTP – WP SMTP Plugin with Amazon… has accumulated 4.0M+ total downloads while Kaigai Spam Mail Blocker has 116.

Detailed Comparison

Rating
4.8/5FluentSMTP – WP SMTP Plugin with Amazon…
◄
Kaigai Spam Mail BlockerN/A
Total Reviews
365FluentSMTP – WP SMTP Plugin with Amazon…
◄
Kaigai Spam Mail Blocker0
Active Installs
500K+FluentSMTP – WP SMTP Plugin with Amazon…
◄
Kaigai Spam Mail Blocker0
Total Downloads
4.0M+FluentSMTP – WP SMTP Plugin with Amazon…
◄
Kaigai Spam Mail Blocker116
Support Resolution
32%FluentSMTP – WP SMTP Plugin with Amazon…
Kaigai Spam Mail BlockerN/A
Last Updated
3 months agoFluentSMTP – WP SMTP Plugin with Amazon…
►
Kaigai Spam Mail Blocker2 months ago
First Released
2021FluentSMTP – WP SMTP Plugin with Amazon…
Kaigai Spam Mail Blocker2026
Age
5 yearsFluentSMTP – WP SMTP Plugin with Amazon…
Kaigai Spam Mail Blocker3 months
WP Requires
5.5+FluentSMTP – WP SMTP Plugin with Amazon…
Kaigai Spam Mail Blocker6.0+
PHP Requires
7.4+FluentSMTP – WP SMTP Plugin with Amazon…
Kaigai Spam Mail Blocker7.2+
Business Model
FreeFluentSMTP – WP SMTP Plugin with Amazon…
Kaigai Spam Mail BlockerFree
Latest Version
2.2.95FluentSMTP – WP SMTP Plugin with Amazon…
Kaigai Spam Mail Blocker1.1.5

Rating Breakdown

FluentSMTP – WP SMTP Plugin with Amazon…

4.8/5(365 reviews)
5
92%
4
2%
3
1%
2
1%
1
3%

Kaigai Spam Mail Blocker

0/5(0 reviews)
5
0%
4
0%
3
0%
2
0%
1
0%

Recent Reviews

FluentSMTP – WP SMTP Plugin with Amazon… Reviews

by lynnefed

Unreliable

This doesn’t work. It doesn’t send or receive any emails. I don’t understand why it gets 5 star reviews. It’s useless and unreliable.

by wonder32

Very nice effort!

This plugin is good, as things should be good!

by norton

Great Plugin

This plugin connects WordPress with Enterprise Mailing and it does it like a charm. The setup takes a few steps, but these steps are straight forward and well documented. Considering that this is a fr

Kaigai Spam Mail Blocker Reviews

No reviews yet

Frequently Asked Questions

Is FluentSMTP – WP SMTP Plugin with Amazon… or Kaigai Spam Mail Blocker more popular?
FluentSMTP – WP SMTP Plugin with Amazon… has 500K+ active installations while Kaigai Spam Mail Blocker has 0. FluentSMTP – WP SMTP Plugin with Amazon… is the more widely-used plugin as of April 2026.
Which has better ratings — FluentSMTP – WP SMTP Plugin with Amazon… or Kaigai Spam Mail Blocker?
FluentSMTP – WP SMTP Plugin with Amazon… has a 4.8/5 rating from 365 reviews, while Kaigai Spam Mail Blocker has a 0/5 rating from 0 reviews.
Are FluentSMTP – WP SMTP Plugin with Amazon… and Kaigai Spam Mail Blocker free?
FluentSMTP – WP SMTP Plugin with Amazon… is free and Kaigai Spam Mail Blocker is free. Both can be downloaded from the WordPress.org plugin directory.
Which plugin has better support — FluentSMTP – WP SMTP Plugin with Amazon… or Kaigai Spam Mail Blocker?
Support resolution data is not available for all plugins. Check each plugin's WordPress.org support forum for current response quality.
Which plugin is updated more frequently?
FluentSMTP – WP SMTP Plugin with Amazon… was last updated 3 months ago and Kaigai Spam Mail Blocker was last updated 2 months ago.

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