Send issues
To send an issue, you must use the NewslettersManager class. It exposes SendIssue method that will send issue through the Notification service API. The following code sends an issue through the Native API:
Figure 1: Sends issue through NewslettersManager
First, you initialize tooManySubscribers variable.Then you get an instance of the NewslettersManager. Then, you call SendIssue to send the campaign passing the issueId and tooManySubscribers. Finally, you check whether the tooManySubscribers parameter is true in order to handle license limitation hole.
NOTE: Each Sitefinity CMS license have different number of subscribers. If the total count of subscribers exceeds the limit - the issue would not be send. You need to handle this situation. See Pricing and Licensing information.