@bidorbuy thanks for the warning. I am creating my first newsletter so am looking for the best practices. My use case is a simple tech-related newsletter (not selling stuff, just informing my existing blog followers). I'll use double opt-in, and I verified that even without the extra headers Mailwizz is able to do the correct bounce and spam report processing. I will include an unsubscribe link in the bottom of the message body as well as a physical address for CAN SPAM. My idea is to make the newsletter be friendly and write it like any email with plain text and no images. In fact I'm planning to send it directly from my normal email address. Would you recommend this plan or might it damage the deliverability and in fact mess up my normal email account?