Allow multiple email addresses against a single role for emailing layouts

allow an email address to be entered on an account in a format of multiple addresses separated by semi colon. For example the sales ledger contact for the send statement role to be entered as

sales@company.com ; accounts@company.com

so that when the layout is email out it goes to multiple contacts.

You are able to enter the email like this at the moment but when emailing the layout it doesn't work.

Or find another easier way to send documents to multiple contacts against a single role.