This question already has answers here: How can I validate an email address using a regular expression? (79 answers) Closed 3 years ago. Is there a good way to check a form input using regex to make sure it is a proper style email address? Been searching since last night and everybody that has answered … Read more
I’m not asking about full email validation. I just want to know what are allowed characters in user-name and server parts of email address. This may be oversimplified, maybe email adresses can take other forms, but I don’t care. I’m asking about only this simple form: user-name@server (e.g. [email protected]) and allowed characters in both parts. … Read more
What is the maximum length of a valid email address? Is it defined by any standard? 8 s 8 An email address must not exceed 254 characters. This was accepted by the IETF following submitted erratum. A full diagnosis of any given address is available online. The original version of RFC 3696 described 320 as … Read more