How to allow multiple email addresses on webform module?
Are you able to upgrade to the latest version of webform?


On your webform page, click the "webform" tab, and then the "e-mails" tab. 
Add a single e-mail address, and click add.
Either click edit, or after adding an email, you should see a settings page. The first label is "E-mail to address".
Make sure the custom field is selected, and enter a comma separated list of emails in this field.