Dear colleagues,
I hope that you are doing well, since along time I tried to use regex to validate EAI addresses for many project I have related to UA, I used the tool
here and used this
Regex “^[\p{L}.%+-]+@[\p{L}.-]+\.[\p{L}]{2,}$” to validate some EAI addresses and it works well like the below screenshot.

Thanks a lot.
All the Best,
Abdalmonem Tharwat Galila
Deputy Manager, Dot Masr Registry,
Operation Sector.

National Telecommunication Regulatory Authority
Office Tel.: +2 02 35341582 - +2
02 35341300
Mobile: +2 010 00049068
Fax
: +2 02 35370537
Website : http:\\www.mcit.gov.eg
E-mail : agalila@mcit.gov.eg
Skype : abdalmonem.galila

DISCLAIMER
This e-mail and any files transmitted with it are
confidential and intended solely for the use of the individual or entity to which they are addressed. If you have received this email in error please notify your system support manager. Please note that any views or opinions presented in this email
are solely those of the author and do not necessarily represent those of the
National Telecom Regulatory Authority (NTRA) . Finally, the recipient should check this email and any attachments for the presence of viruses. The NTRA accepts no liability for any damage caused by any virus transmitted by this email.