[Damin0u]

I don't like the idea of external SMTP for this when http://danfarrelly.nyc/MailDev/ can make everything works locally - and it's very easy to add in our Docker based projects.

[recursive]

SMTP4dev is a good option for Windows.

[lagadu]

Personally I use Papercut and so far I'm pretty happy.

[masklinn]

If you don't need the complexity of a full-blown visualisation UI, you can just (assuming you have Python on the machine) run

     python -m smtpd -n -c DebuggingServer localhost:1025

it will dump all mail to stdout.

(change port as you see fit, below 1024 requires root/sudoing)

[weirdo1]

Yeah, there are a couple very good opensource options like this on github.