Use the user list in your WordPress installation as your mailing list for Campaign Monitor.
This plugin automatically creates and maintains a mailinglist on Campaign Monitor mirroring the list of WordPress users. Typically this plugin is useful when you have information (or functionality) on your website that is accessible for registered users only, and you want to send email updates about that information (or functionality) to those users alone.
For instance, members can subscribe for events on your WordPress website, and you send out announcements to those members using CampaignMonitor. With this plugin you can maintain your list on WordPress, manage their permissions, and the list on Campaign Monitor will always be an exact copy.
This plugin performs a one-way synchronization from WordPress to Campaign Monitor. For instance, it will remove users from your Campaign Monitor list if they do not exist as users in WordPress. If this behavior is too strict for you, we recommend our other plugin Campaign Monitor Dual Registration .
The Campaign Monitor Synchronization plugin checks every 15 minutes whether there has been changes in the user list on WordPress, without contacting Campaign Monitor.
Only if there has been a change, it compares the WordPress user table with the version on Campaign Monitor. This can also be forced by pressing "save and sync" on the plugin options page.
When there are differences only the modifications will be sent to Campaign Monitor in batches using its API. This way the plugin tries to minimise the number of external requests, while maintaining a reasonable level of synchronization.
When a user unsubscribes on the Campaign Monitor website, this will not be overwritten by the plugin, nor will this be stored back in the WordPress database.