[UA-discuss] Regular Expression To Validate EAI Addresses

[Marc Blanchet]

On 14 Aug 2020, at 11:32, Abdelmeniem Tharwat wrote:

> 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<https://rubular.com/> and used 
> this
> Regex "^[\p{L}.%+-]+@[\p{L}.-]+\.[\p{L}]{2,}$" to validate some EAI 
> addresses and it works well like the below screenshot.

{L} is for Unicode property Letter. So:
- for IDNA, it is near (as IDNA base is Unicode Letter property) but not 
quite. see RFC5892
- for EAI, then it is restricting a lot since the mailbox can be almost 
any UTF8 string. see RFC6531

So you may want to use that regex, but be aware of its side-effects, 
including not accepting some domains and mailboxes.

Finally, not all regex engines support Unicode properties, so make sure 
the one used support it.

Regards, Marc.

>
> [cid:image010.png at 01D67260.F5721690]
>
>
> Thanks a lot.
>
> All the Best,
> Abdalmonem Tharwat Galila
> Deputy Manager, Dot Masr Registry,
> Operation Sector.
>
> [NTRA Logo 2016]
> National Telecommunication Regulatory Authority
> [Description: Description: Description: Description: Description: 
> Description: Description: Description: Description: Description: 
> 1365523405_telephone]   Office Tel.: +2 02 35341582<tel:02%2035341582> 
> - +2 02 35341300<tel:02%2035341300>
> [Description: Description: Description: Description: Description: 
> Description: Description: Description: Description: Description: 
> Mobile]    Mobile:  +2 010 00049068<tel:010%2000049068>
> [Description: Description: Description: Description: Description: 
> Description: Description: Description: Description: Description: ICON] 
>   Fax       :  +2 02 35370537<tel:02%2035370537>
> [Description: Description: Description: Description: Description: 
> Description: Description: Description: Description: Description: 
> oNLINE]  Website : http:\\www.mcit.gov.eg<http://www.mcit.gov.eg/>
>                         : 
> http:\\www.tra.gov.eg<http://www.mcit.gov.eg/>
> [Description: Description: Description: Description: Description: 
> Description: Description: Description: Description: Description: 
> 1365523294_email]   E-mail     : 
> agalila at mcit.gov.eg<mailto:agalila at mcit.gov.eg>
>                         : 
> atharwat at tra.gov.eg<mailto:atharwat at tra.gov.eg>
> [Description: 1447802547_skype]  Skype      : abdalmonem.galila
> [Description: static_qr_code_without_logo]
> [Description: Description: Description: Description: Description: 
> Description: Description: Description: Description: Description: 
> 1365523469_error]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.


> _______________________________________________
> UA-discuss mailing list
> UA-discuss at icann.org
> https://mm.icann.org/mailman/listinfo/ua-discuss
> _______________________________________________
> By submitting your personal data, you consent to the processing of 
> your personal data for purposes of subscribing to this mailing list 
> accordance with the ICANN Privacy Policy 
> (https://www.icann.org/privacy/policy) and the website Terms of 
> Service (https://www.icann.org/privacy/tos). You can visit the Mailman 
> link above to change your membership status or configuration, 
> including unsubscribing, setting digest-style delivery or disabling 
> delivery altogether (e.g., for a vacation), and so on.