sufficientlylargen:

argumate:

john.smith🤓gmail.com

If I’m reading RFC 6531 correctly, international email addresses can contain any non-reserved characters in the Local-Part, so while the above is not allowed because an address must contain an @, the following are all technically permitted:

• john.🤓@example.org
• 🤖@example.org
• ⬆⬆⬇⬇⬅➡⬅➡ba▶@example.org
• üm̈l̈äüẗs̈_̈f̈ör̈_̈ëv̈ër̈ÿb̈öd̈ÿ@example.org
• üm̈l̈äüẗs̈_̈f̈ör̈_̈ëv̈ër̈ÿb̈öd̈ÿ@example.org (considered better practice than the previous one)
• ▁▂▃▄▅▆▇▉@example.org
• ╰┴┲╋┱┴╯@example.org
• ƃɹo˙ǝldɯɐxǝ@example.org

• H̢̡̜͎̗̜̎̈́́Ȅ͉̥͔̓̋̾̈̌͒͝͠_͔̮͉͙̉̉͐̈ͧͪĆ̸͖̑̓ͩ̀͛͘O͊ͩ̑ͬ͆́̀҉͖̠M̨͔̞̼̙̜̘̦̲ͫͫ̾̄Ḙ̶̱͙͉ͩ̽͗̃̂̅ͬS̷̬̯͓̩̠̥̒̃ͫ͋̓͐ͬ̚@example.org