I like it. You should also add checks for ipv6 glue records. I advertise ipv6 dns servers but I do not yet have glue, so you still need to connect to my dns servers over ipv4. According to your tool I just have to convince google to add AAAA records to their MX targets and I'm set, but I'm not :)
Why on earth would a parent subject their child to this? There is no way in hell some TSA worker would lay their hands on my child, for any reason whatsoever.
thunderbird does do subject-based threading by default. Fortunately there's a way to disable this by enabling strict-threading.
Threading works by using the In-Reply-To: and References: headers in emails. This way you have a direct correlation between an email and what it was replying to. It allows you to trivially build a tree structure for a thread, which is what a thread is, not a flat conversation.
I get lots of emails from our notification systems that have similar or often the same subject. Having it thread by subject alone is extremely irritating here because it combines completely unrelated things together.
gmail also threads by subject, and I need proper display of threaded message trees too, not forum-style flat threads. That's the other problem with Mail.app :)
I have 2 ducks on my desk for this very reason. That and because others around the office have them and when one talks the rest start talking too (just like dogs in a neighborhood)
Now, to be fair, he is a huge philanthropist and the Bill and Melinda Gates Foundation does some amazing work, but praise what you preach, Microsoft needs to start paying its dues.
Interesting article, but probably poorly timed submissing to HN. You could have used this article to promote your product, but you're in stealth mode so we get a "sign up to hear when my product is available" page, but still have no idea what your product is. Good article, bad marketing. Should have released this about a week after you launched the site :)