Dear All,
Another tool that might become handy for you: this will list the participants in your country which didn't register the e-mail (or are not able to be mailed).
http://www.wikilovesmonuments.org.pt/tools/verify/users.php?country=Portugal
Please stand by if the page takes long to load, especially if it's a country with great number of participants. It might take some time while data is not cached. If you stop loading the page, just hit reload.
Hope it helps.