This plugin helps you to set up forms for subscribing contacts with your mailing lists in Maileon. It is fully configurable and provides customizable templates for simple forms, a sidebar widget, and the possibility to build more complex forms e.g. with Contact Forms 7. Optionally, it is possible to add AddressCheck for your form to prevent misspelled e-mail addresses.
The plugin can be installed from the WordPress plugin directory: https://de.wordpress.org/plugins/xqueue-maileon/