I'm an expat... Showing up somewhere in person once a year is unlikely to be an option for me when you take into account that I visit the US every other year o

I'm an expat... Showing up somewhere in person once a year is unlikely to be an option for me when you take into account that I visit the US every other year on average. And before you suggest using embassies as an option, you're assuming you live in a city with an embassy, or that you should be required to travel to one, regardless of the cost. How do you guarantee that the mail server will be up after you vote? Or that the server sending out the email won't be hit by a denial of service attack? For that matter, how do you determine if someone is at home? --Most people don't have fixed IP addresses, and they can be spoofed anyway. Finally, how do you determine that the vote logged in the database is what the person actually voted for and wasn't changed at a later time? With a paper ballot, you can always recount. Recounting database information is less easy.