email address format
É
Élodie Massa
Xavier de MONNERON This is more complex than you say, as some special characters that were previously strictly forbidden are now accepted by some email providers.
Xavier de MONNERON
Élodie Massa Sorry, I haven't followed RFCs since 1995... and at the time, we just had ASCII 128! But my remark was just to correct Ms. Lydie BARRESI's request (personally, I'm not asking for anything). Indeed, why put an alert on what is allowed (and capital letters have always been allowed!)? Given the changes in 2012, it seems that we now allow a lot of special characters, plus Greek, Chinese, Devanagari and Cyrillic! In short, apart from two points in a row, it becomes complicated to ban anything!
Xavier de MONNERON
Capital letters are allowed in an email address. They are treated by messaging and routing systems as lowercase letters.
On the other hand, special characters are not, in fact.