by Casey 5 (11 reviews)

Simple SMTP

Name: Simple SMTP
Rating: 5.0 (11 reviews)
Author: Casey

Adds a simple mail configuration panel into your WordPress installation. Supports temporary logging and config variables.

Simple SMTP ranks #4,465 among WordPress.org plugins with 2,000+ active installations, is #228 of 3,354 in the Communication category, a 5/5 rating from 11 reviews, and was last updated Aug 11, 2025. Data from WordPress.org, refreshed twice daily — see methodology.

Tested up to WP 6.8 (Current: 7.1)

v1.3.4.1 Current Version v1.3.4.1

Updated 1 year ago Last Update on 11 Aug, 2025

Refreshed 7 hours ago Last Refreshed on

#228 of 3,354 in Communication Top 10% by installs Downloads -46% this week No update in over a year

View on WordPress.org

Rank

#4,465

— No change

Active Installs

2K+

-31.7%

KW Avg Position

45.5

0.5 worse

Downloads

30.9K

+4 today

Support Resolved

— No change

Rating

100%

Review 5 out of 5

5 (11 reviews)

Next Milestone 3K

Total Progress 94.4%

2K+ 3K+

220

Ranks to Climb

Growth Needed

8,000,000

Active Installs

Pro

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Rank Changes

Current #4,465

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Active Installs Growth

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Active Installs 0,000,000+

Growth +0.0%

Peak 0,000,000

Downloads Growth

Downloads

Growth

Peak

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Reviews & Ratings

5.0

11 reviews

Overall 100%

11 (100%)

0 (0%)

Support Threads Overview

Resolved

Unresolved

Total Threads

Resolved

Unresolved

Resolution Rate

Security History

Source: WPVulnerability

No known vulnerabilities on record for Simple SMTP. Checked 1 month ago.

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Plugin Details

Version: 1.3.4.1
Last Updated: Aug 11, 2025
Requires WP: 5.0+
Tested Up To: 6.8
PHP Version: 7.0 or higher
Author: Casey

Support & Rating

Rating: ★ ★ ★ ★ ★ 5
Reviews: 11
Support Threads: 1
Resolved: 0%

Keywords

dispatch email mail sender smtp

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TL;DR

AI summary of the plugin's readme

This plugin is for WordPress site owners and administrators who need custom SMTP mail settings, especially on hosts that restrict control over PHP mail. It solves unreliable outgoing email delivery by letting users configure SMTP settings directly, with optional temporary logging and environment/constant-based overrides for deployment.

Custom SMTP settings panel
30-day email logging overview
Automatic pruning of old logs
Environment and constant overriding
SMTP password encryption via openssl
Disable mailer option
Configurable email security method
Disable SSL certificate verification

Frequently Asked Questions

Common questions about Simple SMTP

This plugin works by instructing PHPMailer - the mail library WordPress have chosen - to use SMTP mode, and adds in the settings you choose. 9 times out of 10, the error messages you receive are configuration errors. PHPMailer provides a good guide to help you figure out these problems. Troubleshooting - PHPMailer. The one instance where an SMTP error can be caused by this plugin is if the SMTP password is stored in the database when the secret keys have been regenerated. You will need to re-save the password to refresh the encryption keys. You can always get assistance from your host and/or SMTP service provider. Plugin compatibility When using the logging functionality, the plugin will store the logged emails in the posts table, as an invisible post type. Normally this should work completely fine, but if you have a plugin that scans custom post types and sends an email about them, there's a chance the third-party plugin might get stuck in a loop. For plugins like this, it is best to disable the functionality on the logging post type (sbss_email_log). The following plugins have had reported issues: * Sucuri Security. One or more of the settings are greyed out This plugin supports being overridden by DEFINE, so please check to see that you are not setting a define for a WP Simple SMTP option. These are most commonly stored in the wp-config.php file. The over-ride hierachy is as follows, with top being the most important. Environmental variable. Constant variable (wp-config define). Multisite network settings. Locally-configured settings.

The logs by default will auto-prune to avoid keeping sensitive details in logs and contributing to database bloat. But if you wish to keep the logs more permanently, then register the following hook (typically in your theme functions.php) to disable the auto-pruning functionality: add_filter( 'simple_smtp_disable_log_prune', '__return_true' );

If openssl is available to PHP, then the password will be encrypted (not hashed) when stored in the database. If unavailable, the SMTP password will be saved into the database as plaintext. The more recommended way of storing the password is to define SMTP_PASS in your wp-config.php file, which should already be locked and inaccessible from the front-end. Note: Multisite over-ride password is currently not encrypted. Please see this issue.

This can be adjusted by the 'simple_smtp_log_table_max_per_page' filter. Returning an integer value to this filter hook will adjust the table page limit.

Yes. With WP-CLI you can perform the following actions: email-log View the log if enabled. email-test Send a test email. To view the available options and help documentation, run wp help or wp help <function name>.

Yes. Each site can have unique settings, unless overriding is on. The network will use the main site settings, so network admin emails will show up in the main site log. Since version 1.2, network-activating the plugin grants special configuration options for super administrators. This includes the ability to set overrides and configure site admin access.

To help diagnose disabled input boxes, when the WordPress site is in debugging mode, the input fields will show a small debug text to indicate where the setting came from. CONFIG is the standard method of saving settings via the admin menu. CONST are overrides typically set in either wp-config.php or your theme's functions.php. MULTISITE are network-defined overrides set in the Network Mail panel. ENV are pulled from the machine/server environmental settings.

Yes! Please see our GitHub repository here for writing issues and/or making pull requests. One of the easiest aspects to contribute to is the SMTP quick configuration segment. If you wish to maintain this aspect, suggest a new setting, or report broken entries, see the SMTP quick config wiki page.