I'll suspect that Maine's version of the FOIA does not make an exception to keep the email addresses of people communicating with the government (or its employees) from being disclosed. It's entirely likely that disclosing the email addresses might have been required by the FOIA law. That's an issue of Maine law and precisely what Maine law says, so I'll leave the definitive answer to a Maine lawyer.
From a practical point of view, often-times the whole point of an FOIA request is to find out who is talking to the government and what they, and the government employees they are talking to, are talking about. This is especially true when reporters or business competitors are the ones making the FOIA request. They might already have a good idea about what's going on and just want to fill in the blanks.
For what it's worth a lot of the story about the South Carolina governor, who said he was off hiking the Appalachian Trail when he was really in Argentina weeping into his mistress' chest, came out when the SC paper did some FOIA work and put two (from the FOIA) and two (from their other sources) together.
Thus, when communicating with the government, you have to assume that your email address will be available to the whole world. So, if you want to limit that possibility of spamming, set up a separate address through gmail or hotmail (they're free) and use that address when communicating with the government.




