validate multiple email addresses in ASP.NET

Question

Hi,
Which best way in ASP.NET to validate multiple email address in cc field ?
I'm using this regular expression:
^[a-zA-Z][\w.-][a-zA-Z0-9]@[a-zA-Z0-9][\w.-][a-zA-Z0-9].[a-zA-Z][a-zA-Z.]*[a-zA-Z]$

but it's failing.
Example of what I would like to achieve:
email1@Stuff .com; email2@Stuff .com

TIA

Answer 1

Hi @Bill Johnson ,
you can try this:

^(([a-zA-Z0-9_\-\.]+)@([a-zA-Z0-9_\-\.]+)\.([a-zA-Z]{2,5}){1,25}(($)|( *;+ *$)|( *;+ *(?=[a-zA-Z0-9_\-\.]))))*$  

This regular expression allows email addresses to be separated by semicolons and spaces, and an optional semicolon is allowed.

Best regards,
Lan Huang

---

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.