Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App v4.0.1
Improve WordPress email deliverability. Connect Gmail SMTP, Microsoft 365, Brevo, SendGrid, Mailgun, Zoho, Amazon SES, etc. #1 WordPress SMTP Plugin.
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- Audit coverage Not yet audited newest version pending
- On Plugin Auditor since Aug 28, 2026
- Last audited Sep 2, 2026
Compatibility & requirements
The PHP and WordPress versions this plugin needs, and how current its version support is.
- Requires PHP 7.0+
- Requires WordPress 5.6.0+
- Tested up to WP 7.0 WP 7.1.3 is current
Audit scores by category
125 checksHow this plugin scores across the six areas we audit, from security to accessibility.
- 87 Passed
- 27 Warnings
- 11 Failed
21 of 37 checks passed.
53 of 61 checks passed.
7 of 12 checks passed.
3 of 6 checks passed.
2 of 3 checks passed.
1 of 6 checks passed.
Code footprint
How much code ships in this plugin, and the file types that make it up.
ZIP file size
20.2 MB
32.1 MB unzipped
Total files
2,332
across all file types
Lines of PHP
245,528
in 1,206 files Large
File types
- PHP
- DAT
- PNG
- TXT
- Other
Top issues
The most important findings from the latest audit, ordered by severity.
- 14 Critical
- 233 High
- 556 Medium
- 160 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 31 audited versions of Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App, The largest regression was in Privacy (-33). The codebase grew 24% in size.
Audited 2.8.7 → 3.9.5 · 31 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
81,902
downloads
Today
8,226
downloads
Week over week
−52%
vs previous week
Month over month
+200%
vs previous month
Download trend: Growing. Abandonment risk: None.
Version intelligence
100% of installs run the current version
- Other
- v3.6
- v3.9
Maintenance & history
How actively this plugin is kept up, from its last update to its release history.
Last updated
This month
Jun 24, 2026
Actively maintainedRelease cadence
~ every 7 days
average between releases
Total releases
177
since Apr 2018 · 8 yrs
Contributors & developers
The people credited with building and maintaining this plugin.
Running Post SMTP in Your Site?
Post SMTP 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.