I will always believe, if you NEED the email to remind you to step into your house, I don't care if you lose it.

Also, it's important to understand how technology works, ISPs (your internet service provider) use a variety of tools to process and filter incoming email. The spam-blocking measures they use can also result in blocking mail from legit sources so that's why personal accountability is key.

If anyone truly cares about receiving an email from SE because you're just not using your houses you should have already whitelisted "ffxiv-housing@square-enix.com"

A simple rule in gmail for example:

Matches: from: (ffxiv-housing@square-enix.com)
Do this: Never send it to Spam, Mark it as important