[snikch]

I have used tools like these for nearly a decade and find them invaluable. My current favourite is Mailpit [1].

The “OG” I would consider Mailcatcher [2] from my Rails days

[1] https://github.com/axllent/mailpit

[2] https://mailcatcher.me/

[Ocha]

Add https://mailsnag.com to the list. You can share email samples with others for the review and it also allows receiving emails for your prod env - send emails to your app and process them in it.

[remram]

Don't they all "allow receiving emails from your prod env"? They all speak SMTP. What am I missing?

[aeaa3]

The idea is that, in a a test environment, we should not actually deliver the mails to the recipient, instead making them available on a web page (or through an API).

[dustedcodes]

Add https://msgdrop.io to that list :)

An API driven approach like Msgdrop is more flexible, as many apps can’t configure a fake SMTP server, especially if you use tools like Mailgun or SendGrid.

[lshevtsov]

The "OG" fake SMTP as a service would be Mailtrap [1].

[1] https://mailtrap.io.