SMTP Mailer

83 Quality Score

Active Installs

22/30

With 70,000 active installs it is well above average for the SMTP category, though it is dwarfed by WP Mail SMTP at four million installs.

Update Freshness

25/25

A perfect 100 maintenance score reflects the very recent update on May 26, 2026, and the explicit compatibility declaration for WordPress 7.0.

User Rating

14/15

A 90 out of 100 from 66 reviewers is strong, but the small sample size means the score is more directional than definitive.

Support Health

8/15

Support health sits at 50 because there are zero threads and zero resolved threads in the tracked support forum, leaving no evidence of an active support channel.

WP Compatibility

15/15

Full marks for compatibility, with WordPress 7.0 both required and tested against, signalling the developer is tracking core releases.

Scores higher than 91% of indexed plugins

About

Configure a SMTP server to send email from your WordPress site. Configure the wp_mail() function to use SMTP instead of the PHP mail() function.

Active Installs 70k+

Rating ★★★★½ 4.6/5

Last Updated 2026-09-07 3:24am GMT

Requires WordPress 7.1+

Tested Up To 7.1

Security History

1 known vulnerability, all patched

1 High

Most recent: March 20, 2026

View details ▸

What It Does

SMTP Mailer reconfigures WordPress to send outgoing email through an SMTP server rather than relying on the default PHP mail() function. Once configured, all emails sent by WordPress, including password resets, contact form submissions, and WooCommerce order notifications, are routed through your specified SMTP host. The plugin acts as a thin replacement for the built-in wp_mail() behaviour.

Who It's For

This plugin suits site owners on restrictive or misconfigured hosts whose transactional emails are landing in spam or failing entirely, and who want a no-frills, focused solution without extra logging or marketing features. It is a reasonable pick for developers or technical users comfortable entering SMTP credentials and verifying deliverability themselves.

Who Should Skip It

Anyone who needs email logging, open and click tracking, backup mailers, or integration wizards for providers like SendGrid, Amazon SES, or Gmail OAuth should skip this plugin. Non-technical users and high-volume senders will be better served by a more full-featured alternative.

The Bottom Line

SMTP Mailer is a lean, recently maintained SMTP plugin that will reliably replace PHP mail() on a WordPress site, earning an overall quality score of 82.7 out of 100. Its main weakness is the absence of any visible support activity and a small ratings pool, so buyers should be comfortable troubleshooting on their own. If you just need SMTP routing and nothing more, it is a solid, no-cost choice, otherwise the alternatives above offer more features and bigger communities.

Related Plugins

WP Mail SMTP by WPForms 97/100

Pick this when you want the largest install base, polished setup wizards for Gmail and Outlook, and built-in email logging with a generous free tier.

FluentSMTP 91/100

Choose FluentSMTP if you need native, first-class integrations with Amazon SES, SendGrid, Mailgun, or Postmark and want detailed logging without a paid add-on.

Post SMTP 91/100

Choose Post SMTP when you require a backup SMTP server, failure alerts, or a mobile app for monitoring deliverability on the go.

MC4WP: Mailchimp for WordPress 89/100

Pick Mailchimp for WordPress instead when your priority is newsletter list management and Mailchimp integration rather than transactional SMTP delivery.

Easy WP SMTP 87/100

Choose Easy WP SMTP if you want a similar minimal SMTP plugin but with a longer track record, email logs, and more than seven times the install base.