In the contacts form, you can enter more than one e mail for persons. That's PERFECT.
When you want to send an email to any people in your contact list, Notes automatically select the Default address; sometimes people need to send an email to a seconary address.. for example
Person : ABC XYZ
Personal mail : email@example.com
Office mail : firstname.lastname@example.org (Default)
If i want to send an email to the personal address, i have to type it in the address bar ("email@example.com), if i type the person name ("abc xyz"), Notes automatically selects the Default ("firstname.lastname@example.org").
There should be an option to select wich address i want to send the mail to for persons with more than one e mail address.