My Go script is pretty simple too, I'm more worried about the stuff around it really. How do you host your PHP script by the way?

> By filtering for a few keywords, you can get of 99% of the form spam.

Interesting, didn't think about it. You do this in the UI logic before the form is submitted? What keywords do you use?

> Deliverability has never been an issue for me since (of course) I run my own mail server.

Fair enough, I assumed this would be an issue so I never explored the possibility of hosting my own mail server.