http://tools.ietf.org/html/rfc2822
IIRC http://tools.ietf.org/html/rfc2047 discusses non-0-127 chars in headers, I'm not sure if that extends to addresses. The bottom line is that any realistic email regex will miss a lot of edge cases, and some fairly normal use cases as well. Email regexes are generally "good enough" and that's about it. Regexes isn't the right solution for completely-spec-compliant email address validation. Note that other email validators can be plugged in fairly easily. Dave On Mon, Aug 25, 2014 at 12:11 PM, Miguel Almeida <mig...@almeida.at> wrote: > I have added it to the JIRA - > https://issues.apache.org/jira/browse/WW-4389 > > > I can't seem to find the actual standard though (i.e., the one in place > that essentially doesn't allow these characters). For documentation > purposes, does anyone know what effective standard disallows these > characters? > > Cheers! > Miguel > > On Mon, 2014-08-25 at 10:51 -0500, Paul Benedict wrote: > > > I looked up the RFC. The document lists itself as a "proposed standard" > [1] > > so it's not really available yet for general use (but correct me if > wrong). > > I propose that an enhancement should be made in JIRA to handle this. > > > > [1] http://tools.ietf.org/html/rfc6531 > > > > > > > > Cheers, > > Paul > > > > > > On Mon, Aug 25, 2014 at 10:46 AM, Miguel Almeida <mig...@almeida.at> > wrote: > > > > > This is the regex for email validation in Struts: > > > > > > \\b^['_a-z0-9-\\+]+(\\.['_a-z0-9-\\+]+)*@[a-z0-9-]+(\\.[a-z0-9-]+)\* > > > \.([a-z]{2}|aero|arpa|asia|biz|com|coop|edu|gov|info|int|jobs|mil|mobi| > > > museum|name|nato|net|org|pro|tel|travel|xxx)$\\b > > > > > > I had a report of this failing for a user with an umlaut email > > > ( shläg...@example.com ). My regex is not very good, but the above > > > mentioned regex doesn't seem to allow said characters. > > > > > > However, International characters above U+007F are permitted by RFC > > > 6531 : > > > > > > http://sphinx.mythic-beasts.com/~pdw/cgi-bin/emailvalidate > > > > > > > > > > > > What is your view on this? Could this regex be incorrect and miss out > > > any special characters? > > > > > > Miguel Almeida > > > > > > > -- e: davelnew...@gmail.com m: 908-380-8699 s: davelnewton_skype t: @dave_newton <https://twitter.com/dave_newton> b: Bucky Bits <http://buckybits.blogspot.com/> g: davelnewton <https://github.com/davelnewton> so: Dave Newton <http://stackoverflow.com/users/438992/dave-newton>
