WP Manifestindependent plugin directory
manifest / email / secure-simple-smtp

Secure Simple SMTP

Simple secure plugin for configuring SMTP in the WordPress admin panel

by @trueresort · github.com/asia-dev-team/secure-simple-smtp

★ 0stars

Install

Download source zip No release zip yet

This is the repository archive. It installs, but the folder name will carry the branch suffix and updates will not flow.

Install straight from GitHub with WP-CLI:

wp plugin install https://github.com/asia-dev-team/secure-simple-smtp/archive/refs/heads/main.zip
No built-in updater. New versions won't appear under Dashboard → Updates. Install new releases yourself, or let Git Updater track the repository.
Readme github.com/asia-dev-team/secure-simple-smtp ↗

WordPress plugin that sends all site email through an SMTP server configured in the admin panel, and lets an administrator send a test email.

What it does

  • Switches WordPress mail (wp_mail) to SMTP through the phpmailer_init hook, with authentication always on.
  • Uses the SMTP username as the sender address and the site name as the sender name.
  • Provides a settings page with SMTP host, port, username, password, and encryption.
  • Sends a test email to any address from the settings page and shows whether it was sent.

Requirements

  • WordPress with administrator access (manage_options).
  • An SMTP server with username and password authentication.

Installation

  1. Copy the plugin folder to wp-content/plugins/.
  2. Activate Secure Simple SMTP in Plugins.
  3. Open Settings → Secure SMTP, fill in the SMTP settings, and save.
  4. Send a test email from the same page.

Settings

All settings are stored in one option, secure_smtp_options.

Setting Key Notes
SMTP Host smtp_host for example smtp.example.com
SMTP Port smtp_port 587 for TLS, 465 for SSL
SMTP Username smtp_user also used as the From address
SMTP Password smtp_pass
Encryption smtp_secure tls, ssl, or none

Project structure

trues-smtp.php   The whole plugin: settings page, settings registration and sanitization, mailer setup, test email

Known limitations

  • SMTP is forced for all mail as soon as the plugin is active, even before the settings are filled in; until then the site cannot send email.
  • The username is sanitized as an email address, so non-email usernames (for example apikey) are erased on save.
  • The password is sanitized as a text field, which can change passwords that contain characters such as < or %.
  • The password is stored in plain text in the database and is printed into the settings page HTML as the field value.
  • The Encryption setting renders both a text input and a select with the same name.
  • An empty port is saved as 0 instead of falling back to 587.