I prefer self-hosting MailHog:
> Mailpit was originally inspired by MailHog which is no longer maintained and hasn't seen active development or security updates for a few years now.
Security updates sure, but what really needs to update on an STMP (+ TLS?) solution?
Although in mailhog's case it looks like STARTTLS was never implemented. Hence the forks.
- https://github.com/maildev/maildev
- https://github.com/Nilhcem/FakeSMTP