![[The AI Show Episode 142]: ChatGPT’s New Image Generator, Studio Ghibli Craze and Backlash, Gemini 2.5, OpenAI Academy, 4o Updates, Vibe Marketing & xAI Acquires X](https://www.marketingaiinstitute.com/hubfs/ep%20142%20cover.png)
![[DEALS] The Premium Learn to Code Certification Bundle (97% off) & Other Deals Up To 98% Off – Offers End Soon!](https://www.javacodegeeks.com/wp-content/uploads/2012/12/jcg-logo.jpg){kind=logo}
![From drop-out to software architect with Jason Lengstorf [Podcast #167]](https://cdn.hashnode.com/res/hashnode/image/upload/v1743796461357/f3d19cd7-e6f5-4d7c-8bfc-eb974bc8da68.png?#)
.png?#)
.jpg?#)
_Christophe_Coat_Alamy.jpg?#)
 (1).webp?#)
![Rapidus in Talks With Apple as It Accelerates Toward 2nm Chip Production [Report]](https://www.iclarified.com/images/news/96937/96937/96937-640.jpg)
What characters to limit when user enters an email?
I have a backend that does not support emoji characters in all of its fields, so I want to block them directly in the frontend application. I'm in the register section, and I want to limit the possible characters for the email field. I know that RFC 5322 specifies that many particularities can be found in those addresses, including special characters. Even emoji can be put there (link). I'm using a whitelist to implement this block. What character should I whitelist to support the common emails without falling into whitelisting every characters supported by email addresses?
I have a backend that does not support emoji characters in all of its fields, so I want to block them directly in the frontend application. I'm in the register section, and I want to limit the possible characters for the email field. I know that RFC 5322 specifies that many particularities can be found in those addresses, including special characters. Even emoji can be put there (link).
I'm using a whitelist to implement this block.
What character should I whitelist to support the common emails without falling into whitelisting every characters supported by email addresses?
