And they're unfortunately beyond ours as well; we do send reminder emails but we have no control over what email providers do with the emails once sent. We also provide a 21 day period where the account is suspended, but not terminated - during this time the domain will display a "suspended" page, which itself recommends signing in to view why if you're the account owner.
As we're going to keep going 'round and round with this, I am closing the topic. While I do sympathize with the situation, there is nothing else that can be done. If you have suggestions on better ways to handle the inactivity suspensions/terminations, those would be better served in Feedback/Suggestions, bearing in mind that some solutions simply won't be possible due to the sheer number of accounts created and hosted at any one time.