The campaign in District 1 would produce some memorable tv ads.
The electorate for the French Parliament is based on persons registered with embassies and consulates (apparently this registration goes up before presidential elections). Voters are assigned a polling place. For example, French voters assigned to the Houston consulate (TX, AR, and OK) voted in Houston, Dallas, and Austin. For the presidential election, voting was in person. For the parliamentary election, voting could be by mail or proxy, but that was somewhat hard to do (e.g. candidate lists were only established a couple of weeks before the election, and you would be subject to the vagaries of the local postal system).
Anyhow, registration with a consulate requires an e-mail address in case they consulate has to organize an evacuation. The e-mail address was also shared with the campaigns, with the caveat that a voter could opt out, and a campaign would then have to honor that. Voters could also have a 2nd e-mail address, if they wanted to separate their official e-mail from campaign e-mail.
Perhaps this would let candidates in the 1st District to target their audience.