This module integrates the Campaign Monitor API into Drupal and provides a webform submit handler that lets you subscribe users to specific lists on Campaign Monitor. You can use triggering element (usually checkbox) to conditionally subscribe user.
This module could assumed as Drupal 8+ version of webform_campaignmonitor.
The main difference, besides the supported Drupal version, is that Campaign Monitor Webform Handler uses Campaign Monitor REST API Client (https://www.drupal.org/project/campaign_monitor_rest_client).
Project link
https://www.drupal.org/project/campaign_monitor_webform
Git instructions
default branch 1.0.x
Issue fork projectapplications-3308758
Show commands
Start within a Git clone of the project using the version control instructions.
Or, if you do not have SSH keys set up on git.drupalcode.org:
Comments
Comment #2
avpaderno