FluentSMTP – WP SMTP Plugin with Amazon SES, SendGrid, MailGun, Postmark, Google and Any SMTP Provider vs Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App (2026): PluginCheck
Quick Verdict
Pick FluentSMTP if you want the simpler, lighter plugin backed by 600,000 active installs and a 96/100 rating. Pick Post SMTP if you need advanced features like email logs, backup SMTP fail-over, alerting, and a mobile app, plus slightly better support resolution.
Both FluentSMTP and Post SMTP are top-tier WordPress plugins designed to solve the same core problem: reliably sending transactional email from your WordPress site through proper SMTP or API-based delivery providers. The choice between them comes down to whether you prioritize a leaner, faster-loading interface with a larger install base, or a more feature-rich toolkit with stronger support responsiveness. Either way, both plugins vastly outperform relying on default PHP mail().
FluentSMTP – WP SMTP Plugin with Amazon SES, SendGrid, MailGun, Postmark, Google and Any SMTP Provider
The Ultimate Forever Free Mail SMTP Plugin for WordPress. Connect with any SMTP, SendGrid, Mailgun, Amazon SES, Brevo, Postmark, Sparkpost, Google...
- Active installs 600k+
- Rating 4.8/5 (386)
- Last updated Dec 28, 2025
- Support resolved 80%
- Tested to WP 6.9.4
- Requires PHP 7.4
Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App
Improve WordPress email deliverability. Connect Gmail SMTP, Microsoft 365, Brevo, SendGrid, Mailgun, Zoho, Amazon SES, etc. #1 WordPress SMTP Plugin.
- Active installs 300k+
- Rating 4.7/5 (523)
- Last updated Jun 24, 2026
- Support resolved 84%
- Tested to WP 7.0
- Requires PHP 7.0
Where FluentSMTP – WP SMTP Plugin with Amazon SES, SendGrid, MailGun, Postmark, Google and Any SMTP Provider Wins
Larger user base
FluentSMTP has 600,000 active installs, double Post SMTP's 300,000, which generally means more community-tested stability and more third-party tutorials available.
Higher user rating
FluentSMTP scores 96/100 across 386 ratings, edging out Post SMTP's 94/100 from 523 ratings, suggesting higher satisfaction per reviewer.
Simpler feature footprint
FluentSMTP focuses on sending reliability without heavier logging or alerting features, which can translate to a lighter footprint for sites that just need reliable outbound email.
Where Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App Wins
Better support resolution
Post SMTP resolves 84.2% of support threads, compared to FluentSMTP's 80.0%, giving it a slight edge when you actually need help.
More recent updates
Post SMTP was last updated on 2026-06-24, roughly six months more recently than FluentSMTP's 2025-12-28 update, which suggests more active maintenance against provider API changes.
Richer feature set
Post SMTP includes email logs, backup SMTP fail-over, alerts, and a mobile app, which FluentSMTP does not match in scope, making it the better pick for sites that need visibility and fail-over.
Score-by-Score Comparison
FluentSMTP scores 86/30 versus Post SMTP's 82/30, reflecting its larger 600,000 install base compared to 300,000.
Post SMTP scores 100/25 versus FluentSMTP's 96/25, backed by a more recent update in June 2026.
FluentSMTP scores 96/15 versus Post SMTP's 94/15, with a slightly higher per-reviewer rating despite fewer total reviews.
Post SMTP scores 84/15 versus FluentSMTP's 80/15, indicating modestly better thread resolution rates.
Both plugins tie at 100/15 for compatibility, confirming no significant differences in tested WordPress and PHP coverage.
The Bottom Line
These plugins are extremely close in overall quality, with FluentSMTP at 91.43/100 and Post SMTP at 91.26/100, a difference of just 0.17 points. For a typical site that simply needs reliable SMTP delivery, FluentSMTP is the safer default given its 600,000 installs, higher rating, and lighter scope. Choose Post SMTP instead if email logging, fail-over, alerts, or the mobile app matter to you, and you value the slightly better support resolution and more recent updates.