I work for a union and while sometimes work emails are the best way to get in touch with our members, we are not always allowed to use them. For instance, we are not able to send political emails to certain workplace emails. As such, the absence of an option to target blasts to specific emails is incredibly inconvenient and leads to serious problems with managing out lists and communications. A simple ability to classify emails as work, home, other, etc would be incredibly valuable for us, and I imagine other unions, groups, and campaigns.