Defines the available newsletter types. Normally you don’t have to change these.
A tuple with all NEWSLETTER_TYPE id’s which are considered a massmail newsletter.
Massmail are newsletters which are sent to many receivers at the same time.
A tuple with all NEWSLETTER_TYPE id’s wich are considered a workflow newsletter.
Workflow newsletters are emails wich are sent to each receiver indivitually, for example a registration complete email wich is sent right after a user registers.
The content with of a newsletter, has to match the with in the template.
A list of position choices for the TextWithImageNewsletterContent.
The quality in percent which is used to compress jpeg images.