Sometimes you are looking so hard for a solution, that you won’t even see them even if they punched you in the face. Email Subaddressing is one of those issues I couldn’t get fixed.
Error: Your email address is invalid.
Every time I see those or similar words when I fill out a registration form I start to cry a little. It’s not my email address that is invalid, it’s the websites email validation functionality and it’s a great and effective way to loose visitors and/or customers quickly.