If you send an e-mail to more than 500 e-mail addresses, you have to pay extra attention to the content and settings. With large shipments (>500 e-mails) you send mass e-mails and there is a risk that the message ends up in the spam folder of the recipient. This can be annoying for the response rate of a survey. The e-mail cannot be noticed by the recipient. The tips below will help you get your email to the recipient as best as possible.