I think many businesses may benefit from having multiple contacts (e.g. primary AND secondary etc.) within a business contact. It would be useful to be able to store multiple contact details particularly phone numbers and email addresses.
In addition to this, MYOB may then require you to select the appropiate email address/es when sending quotes or invoices, or give you the option to add an email that is not listed in the contact file, just as they do now.
"Multiple individual contacts within a business contact"