Mailrelay

This plugin allows you to sync all WordPress users with one or more groups in Mailrelay allowing your website users to receive newsletters, notifications etc.

Configuration

Once the extension is installed you will have a new settings option: Mailrelay -> Authentication

At this page, you will need to fill in the following data:

• Account
• API Key

The Account information can be found in your Mailrelay’s welcome email.
And your API Key can be created at your Mailrelay account under settings -> API Keys

Once this data is successfully saved you can run the user sync.

Before starting, make sure you have an active Mailrelay.com account and your account has a valid Api Key.

1. Upload mailrelay folder to the /wp-content/plugins/ directory or download it from the WordPress plugin repository
2. Activate the plugin through the ‘Plugins’ menu in WordPress
3. Go to Settings -> Mailrelay and configure your account details

3.0.1

Release Date – 07 Aug 2025

• Fix WooCommerce session null reference error in cart sync

3.0

Release Date – 23 Jun 2025

• Added WooCommerce integration with product and cart synchronization
• Changed plugin to sync subscribers using background tasks avoiding errors if API isn’t available

2.1.3

Release Date – 24 Oct 2023

• Fixed a deprecation warning in newer PHP versions

2.1.2

Release Date – 24 Oct 2023

• Added nonce validation in admin pages

2.1.1

Release Date – 15 Sep 2022

• Disable clicks in Mailrelay form iframe when displaying it in Gutenberg editor
• Fix form widget not working on newer Gutenberg editor versions
• Fix issue with only part of groups being displayed

2.1.0

Release Date – 07 Jul 2022

• Added Gutenberg block to display Mailrelay signup forms
• Added WPForms Mailrelay integration
• Fix issue with subscriber name not being synced correctly.

2.0.2

Release Date – 08 Feb 2022

• Fix issue with empty subscriber name being synced in certain cases

2.0.1

Release Date – 07 Feb 2022

• Fix issue with connection settings not being saved

2.0

Release Date – 04 Feb 2022

• Add option to sync WooCommerce customers
• Plugin is compatible with WordPress 5.9.
• Removed support for legacy API

1.8.1

Release Date – 29 Oct 2016

• Fix a warning depending on error_reporting set in PHP

1.8.0

Release Date – 17 May 2016

• Add option to automatically sync new users

1.7.4

Release Date – 18 Nov 2015

• Add German translation