For those who develop locally webapps (e.g. using Xampp) it is often a pain in the a*# to test email functionality like sending emails form a contact form. Especially when using Windows 😉
To be able to test this in a very easy way I was recommend by a friend (thanks again for that) to use a very nice tool called smtp4dev.
It’s just an exe file to execute whenever you like that places itself into the tray, acts as an SMTP server and as soon as you send an email with your webapp it just displays it into a list and does not send it. So you can easily check all the stuff that you want to by opening e.g. with Thunderbird.