This post is from one of several previous incarnations of this site and probably doesn’t quite fit the current format. In a former life this was a group blog and a tumblelog before it became a static jekyll site. If anything looks broken or is worded oddly that could be why. Pardon the dust.
Validating email addresses from international domains using Punycode. I’ll admit to being blissfully naive about the intricacies of validation & i18n.