Mailing letter constructor that gives output code in html?

Question

Email Marketing

Please tell me the designer of letters for mailing, so that later you can get the code in html. I found a bunch of constructors, but they all involve sending emails from their system, and I need to finish the code and send them from our system.
(The way out is to send a letter to yourself, but I did not succeed in extracting the code in this way).

Answer 1

https://mosaico.io

Answer 2

This question has already been asked recently, here is my answer: https://toster.ru/answer?answer_id=978837

Answer 3

At the moment, there are many such services that allow you to later copy or download a file with the html code of the letter. For example, stripo, topol, BEE Free, Mosaico, Postcards, EmailFactory.