Are there bots that automatically create an email?

There are various APIs, modules and libraries that can be created with these bots. The whole goes without, but with those one saves some work. Which language you use depends on your knowledge and skills. In Python you could smtplib -Use module to send emails via a SMTP server. If you prefer to work with JavaScript (Node.js) nodemailer a suitable package for sending email well.

You save all necessary data such as SMTP Host and Port as well as username and password. Then write a function that, for example, draws all addresses from a JSON and sends an arbitrary email to them. Instead of the JSON, you can also request another database or the like. The logic is actually relatively equal and it almost doesn’t matter what language you use. And if that’s too much, you can also use something like Mailtrain, Sendy or Mautic.