Level 80
@mehrdad70 Just use something like Mailchimp or Campaign Monitor. It will be cheaper than all the time you’re going to spend building something from scratch yourself. They’ll also ensure newsletters are sent from reliable infrastructure, IP addresses that haven’t been black-listed, will handle unsubscribes and tracking; again everything you’d need to build and maintain yourself.
Do you have a DevOps and infrastructure team as big as Mailchimp or Campaign Monitor that’s on call 24/7…?