One little thing:

In general you shouldn't leave yourself logged into any website on a shared computer, but that is doubly the case here because postmill doesn't require your old password before changing it to a new one. I definitely get why, being able to change my password even if I forgot the old one would have saved my ass many times, and it's not like someone can't already do a lot of damage if they see someone logged in like that. But it's a quirk I feel worth pointing out!

If something like that happens to you, let us know and we'll do what we can to sort it out.