When you have a large existing customer base, it’s often typical to want to send out emails for a variety of reasons (notification, marketing etc..). Services like MailChimp are expensive, and other tools typically come from unknown vendors with little reputation, and fail to adhere to legal requirements like GDPR.
To solve this, we built our own app called Delay Mailer. It allows you to load in a GDPR compliant email template and a spreadsheet of recipients. Once a subject and attachments are set, it sends the messages using a natural timing to help avoid your address from getting black-listed for sending too much at once.