There is a particular member in my site that needs access but her corporate email that is attached to her account has an apostrophe in it. How do I allow EE to allow apostrophes in emails for member accounts?

  • If it was me I would be getting her tech department to create her an alias without the apostrophe. Would save a lot of hassle. Mar 9, 2013 at 1:56
  • That was my first thought, but this person works for a giant multi-national oil company who's less likely to change their email stuff any time soon.
    – lealea
    Mar 9, 2013 at 2:17

2 Answers 2


In order to allow the apostrophe, I had to hack the core code. Specifically, a CodeIgniter helper within:


In there, find around line 40 this:

return ( ! preg_match("/^([a-z0-9\+_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/ix", $address)) ? FALSE : TRUE;

Then replace that line with this instead:

return ( ! preg_match("/^([a-z0-9\+_\-']+)(\.[a-z0-9\+_\-']+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/ix", $address)) ? FALSE : TRUE;

Found the particular regex in an old EE Forum Thread here: http://ellislab.com/forums/viewthread/84711/

Anything wrong with this approach or the expression used?

  • Yup, I would just do this and document it in a 'hacks.txt' in the site root for reference. :) Nov 12, 2013 at 10:43

Incase someone else comes to this post.. this has heen resolved in the developer version of codeigniter.


Be sure to also update the Form_validation class as the email validation function there is different from the email_helper functions.

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