Onboarding Email page Suggestions

[berggrenmille]

• Add a placeholder text to clarify to user that you should enter an email and not a code
• The validation accepts emails such as Johndoe@g. Is this validation correct?

[PeterWaher]

A regular expression that claims to be fully RFC 822-compliant can be found here:

https://pdw.ex-parrot.com/Mail-RFC822-Address.html

RFC 5322 is simpler, and generates a shorter RegEx:

https://stackoverflow.com/questions/201323/how-can-i-validate-an-email-address-using-a-regular-expression

In C#, it is simpler to check the validity of the address, by trying to instantiate a MailAddress:

try {
    address = new MailAddress(address).Address;
} catch(FormatException) {
    // address is invalid
}