Create mailing lists
To create a mailing list, you use the NewslettersManager class. First, you initialize the NewslettersManager. To get all mailing lists, you call GetMailingLists. Then, you check whether an item with the specified ID exists. Finally, you call the CreateMailingList method, set all properties, and save the changes.
The following code creates a mailing list with specific Id, Title, DefaultFromName, DefaultReplyToEmail, and DefaultSubject with the Native API: