Long surveys are unpopular and certainly not recommended in mobile email. It’s a good idea to display only the first question and only after it has been answered can further questions follow or be opened in the email body. You can also integrate a visible progress bar, a slider for selecting a scale or a time limit for answering questions. The provider saves the redirection to a landing page. Answering the questionnaire is done much more streamlined and efficiently. The participation rate is increased as a result. If a form is also to be filled out, the recipient data can already be pre-filled in the mail.