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There are several alternatives. Most of them, including mailcatcher, seem to be unmaintained.

Mailpit is an alternative that has regular updates: https://mailpit.axllent.org/

> Most of them, including mailcatcher, seem to be unmaintained.

MailCatcher is great. It "just works" and has Docker images for both AMD64 and ARM64 CPUs.

Thanks for the link - we’ve been using mailhog for local smtp testing and it still works ok for basic tasks, but it’s not maintained any more.

Pitching my own: https://github.com/mjl-/mox has a "mox localserve" subcommand that runs a mail server on localhost for testing, including a pedantic mode and special addresses that cause failure conditions you may want to test for. This is actually a full mail server (SMTP, IMAP and much more) and it comes with a webmail client. The "localserve" mode was just so easy to implement that I couldn't resist.

Yeah thanks for this, I’ve been using it for years! Recently switched to mailslurper:

https://github.com/mailslurper/mailslurper