Lurpak are running a compo to win a breadmaker. Whoop de do. Anyway, being the person who opened the new butter at work, I thought I'd enter the code on the site for a giggle.
Now, I like to be able to sort my email - I like to treat newsletters, lists and personal mail differently. It's a necessity when you get around a hundred emails a day. A really smart way of doing this is with labels in gmail - by using email@example.com you can 'presort' mail in to the relevant label.
The format of that email address is absolutely in line with the RFC standards for email - see http://tools.ietf.org/html/rfc3696, for instance.
It's surprising how very few sites accept the + sign as a valid character, however. I'd estimate 1 in 20 on a good day, with the wind behind me.
I wouldn't mind so much, but it's useful to work out if company X has sold on your email address. If, when signing up for a service, you format your email address as firstname.lastname@example.org. All mail sent to that address ends up in your main inbox, but premarked and filed as from sevicename Then, should spam start appearing addressed to that specific address, you can be fairly sure that servicename is the culprit.
Anway, I wish more people were aware of this tip, and that more developers implemented validation properly. That's all.