WP Mail SMTP by WPForms – The Most Popular SMTP and Email Log Plugin v4.9.0
WP Mail SMTP is a WordPress plugin that routes outgoing site email through an SMTP or API-based mail service and logs sent messages to improve email deliverability.
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- Audit coverage Up to date 30 versions audited
- On Plugin Auditor since Aug 31, 2026
- Last audited Aug 31, 2026
Compatibility & requirements
The PHP and WordPress versions this plugin needs, and how current its version support is.
- Requires PHP 7.4+
- Requires WordPress 5.5+
- Tested up to WP 7.0 WP 7.1.3 is current
- Version adoption 44% run the current version
Audit scores by category
125 checksHow this plugin scores across the six areas we audit, from security to accessibility.
- 94 Passed
- 25 Warnings
- 6 Failed
27 of 37 checks passed.
54 of 61 checks passed.
6 of 12 checks passed.
3 of 6 checks passed.
2 of 3 checks passed.
2 of 6 checks passed.
Code footprint
How much code ships in this plugin, and the file types that make it up.
ZIP file size
3.7 MB
8.4 MB unzipped
Total files
879
across all file types
Lines of PHP
96,769
in 477 files Large
File types
- PHP
- SVG
- PNG
- JS
- Other
Top issues
The most important findings from the latest audit, ordered by severity.
- 1 Critical
- 29 High
- 208 Medium
- 67 Low
This is a preview of notable findings. Full file-level results, line numbers and code context are in the scan.
View full reportHow scores changed across versions
Across 30 audited versions of WP Mail SMTP by WPForms – The Most Popular SMTP and Email Log Plugin, Security improved the most (+8). No category regressed over this span. The codebase shrank 55% in size.
Audited 3.0.2 → 4.9.0 · 30 versions
How issues changed across versions
Findings by severity for each audited version, so you can see which issues were fixed over time.
Download momentum
How fast this plugin is being installed lately, and whether that pace is rising or slowing.
Last 7 days
136,462
downloads
Today
11,314
downloads
Week over week
−15%
vs previous week
Month over month
−67%
vs previous month
Download trend: Declining. Abandonment risk: None.
Version intelligence
56% of installs run an older version
≈ 2.2M+ sites on a lower-scoring version.
- Other
- v4.7
- v4.8
- v4.9
Maintenance & history
How actively this plugin is kept up, from its last update to its release history.
Last updated
2 mo ago
Jun 25, 2026
Actively maintainedRelease cadence
~ every 34 days
average between releases
Total releases
98
since Sep 2007 · 19 yrs
Contributors & developers
The people credited with building and maintaining this plugin.
WP Mail SMTP by WPForms and its trademarks are used only to identify the plugin analyzed and remain the property of their owners. This is an independent Plugin Auditor audit, not affiliated with, sponsored by, or endorsed by the plugin's developer. Metadata may come from WordPress.org; scores, findings, classifications, and visualizations are independently generated by Plugin Auditor. Full disclaimer.