Here's an example of the above in action: Maybe if you added an explanation or description to go with it?
John, many users will not be intent on entering a fake/wrong address, but may enter it incorrectly by accident.
is fine - checking anything else is well into 'diminishing returns'...
Are there any other libraries doing this which are included in Android already or would I have to use Reg Exp? Apparently the following is a reg-ex that correctly validates most e-mails addresses that conform to RFC 2822, (and will still fail on things like "[email protected]", as will org.apache.commons.validator.routines. A valid check should separate the local part (before the at-sign) and the domain part.
Note that most of the regular expressions are not valid for international domain names (IDN) and new top level domains like or (if you check for country codes or .org, .com, and so on).
The Linkify class has some pretty useful helper methods that might be relevant, including regular expressions designed to pick up phone numbers and email addresses and such: regex lovers, the very best (e.g.
consistant with RFC 822) email's pattern I ever found since now is the following (before PHP supplied filters). So sometimes it is best that we ensure they are entering a valid e-mail address for their own sake. If someone forgets their password we must have a way of securely resetting their password to allow them to continue using the service they have paid for.What's a good technique for validating an e-mail address (e.g. The best approach is to transform the address in an IDN compatible format (if required), validate the local part (RFC), check the length of the address and the check the availability of the domain (DNS MX lookup) or simply send an email. You should also consider the max length of the local part and domain (in sum 255 chars including the at-sign). I was mostly asking out of curiosity :) Can I STRONGLY recommend you don't try to 'validate' email addresses, you'll just get yourself into a lot of work for no good reason.