Is there a way to do this in Google Apps email? If not there should be
PunchAndPie: I do something similar with labels and filters.I basically setup multiple email addresses in my Apps email account, then create a Label for each one.Then setup filters to check the 'to:' and 'from:' fields for a given email address, and apply the label.Now your 'Labels' sidebar acts as that drop-down that you wanted.