I see you got this latest batch out without me, but for the future, you might want to consider the following:
1. Small batch of messages. Mayor opens up member list (at top of page) and clicks on "email" button next to person to be notified. Mayor copies and pastes message into text box, and sends off the email. Repeat for each person. This feature of phpbber is a blind email forwarding system. It reveals neither the Mayor's email address nor the recipient's email address, to either party. The email will appear to come from b77_ad at yahoo.
3. If the Mayor doesn't have time to do the above, s/he can post the list of people to be notified, and the message, and the rangers can do it. The ranger can first go into the Admin Panel, switch the apparent email return address from b77_ad to the mayor's address, then send the messages, then switch the email address back. Then the messages will appear to come from the mayor.
3. Same idea, but PM. This way, the message is only received when the person gets on the board, and doesn't bother people who are inactive. Just go to the member list and click on PM for each recipient. Who ever is doing the PMing should be in the Mayor's suit at the moment.
4. If the Mayor wants the email to appear to come from the Mayor's account, for a mass emailing, s/he should request that here, with a copy of the text. A ranger can then go into the Admin Panel, under general configuration, and change the apparent email return address to the Mayor's address, then send the message to the "all emailees" group, then remember to switch the apparent email return address back to b77_ad.
There is really no reason to look up actual email addresses with this system.