> The fact that many websites do not allow + in an email address during validation is a common programming mistake and the sign of an undertrained engineer. Or

> The fact that many websites do not allow + in an email address during validation is a common programming mistake and the sign of an undertrained engineer. Or just sanity. I am totally onboard (https://news.ycombinator.com/item?id=31797121#31822961 https://news.ycombinator.com/item?id=31797121#31822961) with having compliant parsers (or just not using them) But the RFC from what I can recall is _wild_. I can't find the part so maybe I am mixing something else up, but I believe you can embed comments into an email address. All I am saying is that the possible scope of valid email addresses is likely so large, trying to write a parser for them is a sign of an underexperienced team rather than not having one at all.