Resend MediaWiki Extension

What it does: sends MediaWiki user emails through the Resend API instead of the default mail transport.

Why is this needed: it allows API-based email delivery without SMTP setup and keeps email infrastructure separated from your MediaWiki host.

Installation

Note: this version of Extension:Resend targets MediaWiki 1.43+.

1. Download the extension (git clone --depth 1):

cd /path/to/mediawiki/extensions
git clone --depth 1 https://github.com/jmnote/Resend.git

2. Configure Composer merge loading in /path/to/mediawiki/composer.local.json and install dependencies.

For details, see: https://www.mediawiki.org/wiki/Composer#Using_composer-merge-plugin

{
    "extra": {
        "merge-plugin": {
            "include": [
                "extensions/*/composer.json",
                "skins/*/composer.json"
            ]
        }
    }
}

cd /path/to/mediawiki
composer update

3. Update LocalSettings.php (see configuration below).

Configuration in LocalSettings.php

wfLoadExtension( 'Resend' );
$wgResendAPIKey = 're_xxxxxxxxxxxxxxxxx';

How it works

• It intercepts MediaWiki email delivery using the AlternateUserMailer hook.
• If Resend delivery succeeds, the default MediaWiki mailer is skipped.
• If $wgResendAPIKey is empty, it returns an error.