Acceptable email address syntax according to RFC 1 Email syntax basics. The syntax for an email address is familiar to most Internet users. ... 2 Local part 3 Domain part. The domain part cannot be more than 255 characters in length and must conform to the specification for hostnames which is a list of dot-separated DNS labels.What is an RFC (Request for comments)?
There specifications are called Requests For Comments (RFC). They are published by the Internet Engineering Task Force (IETF) and the Internet Society (ISOC), the principal technical development and standards-setting bodies for the Internet.When was the email address format standardized?
While early messaging systems used a variety of formats for addressing, today, email addresses follow a set of specific rules originally standardized by the Internet Engineering Task Force (IETF) in the 1980s, and updated by RFC 5322 and 6854.What is Internet standards RFC 7841?
It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 7841 .