Apps similar to Mail Server Builder include Google Workspace. It's paid, but mailcow: dockerized and Mail-in-a-box are free. Other options are hMail Server, Poste.io and Mailu. In total there are six Mail Servers like Mail Server Builder for Linux, self-hosting, Windows, Mac and the web.
Google Workspace delivers a cloud-based suite combining Gmail, Calendar, Meet & Drive to enhance collaboration through tools like Docs and Sheets. Offers secure storage options, custom domain emails, and robust management capabilities with 2FA and 24/7 support.
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mailcow is a mail server suite based on Dovecot, Postfix, SOGo, Rspamd and other open source software, that provides a modern Web UI for administration.
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hMailServer is a free e-mail server for Microsoft Windows. Its used by Internet service providers, companies, governments, schools and enthusiasts in all parts of the world.
Full featured solution for your Email server. Native implementation of last anti-SPAM metods, webmail and easy administration included.
Mailu is a simple yet full-featured mail server as a set of Docker images. It is free software (both as in free beer and as in free speech), open to suggestions and external contributions.
