regexemailexpresso

Regular Expression for multiple specific-domain email addresses (separated)

Good day,

I'm looking for a regular expression that would validate the following email addresses:

a@domain.com, b@domain.com

So far, I have this:

^([\w+-.%]+@domain\.com,?\s*)+$

It should not return anything in case of:

a@domain.comb@domain.com     or

a@domain.com b@domain.com
  1. It should also return a result if a ; is entered.
  2. Also, is there a way to ensure a result will be returned only when there is a single @ in an address?

Any help would be appreciated.

Solution

  • The regex you are looking for is ^(?>\b[\w+-.%]+@domain\.com(?:[,;]\s*)?)+\b$.

    I am using atomic grouping with (?>...) so that no backreferences are created.

    Result is as you request: a@domain.com, b@domain.com

    Also tested with Expresso.