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Cake day: February 14th, 2025

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  • The answer to this depends on how much the magic device with the oxygen weighs.

    Also just going to set aside anything to do with sky diving and space suits and having friends and everything else that I don’t know anything about.

    I only know this from playing Simple Rockets on android but basically you direct your thrust in the direction you’re moving in order to reduce your velocity, and you’ll fall down to earth.

    Think of an orbit as the balance between falling towards earth and zipping past earth. If you fly past too fast then you just fly past and maybe the gravity pulls you a bit but not much. If you fly past too slow the gravity pulls you down to earth and you crash. If you fly past at the same speed you fall towards earth the two directions balance out and you end up just spinning around earth.

    Therefore, If you’re in a stable orbit on the space station, and then you slow down, you’ll start to fall down towards it instead of “falling” around it in an orbit.

    If you only slow down a little bit you’ll start moving towards Earth but you’ll be moving way too fast for an unshielded human to enter the atmosphere without burning up.

    You’d have to slow yourself down, by directing thrust towards the horizon you’re headed towards, enough so that you’re not going fast enough to burn up.

    Whether or not you can slow down enough, quickly enough, depends on how much thrust your magic device can provide and how much that device makes you weigh.









  • I don’t think the SPF / DKIM / DMARC stuff is overly complex nor the core of the problem.

    In my case it was recipients with bonkers microsoft exchange servers that just had weird ideas about who should be sending them emails.

    For example, one thing that tripped me up forever ago was grey listing. Apparently the receiving server just wouldn’t acknowledge the sending server for an arbitrary period of time, say 12 hours or so. Spam senders would usually give up long before then, while a legit server would keep trying because it’s legitimately trying to deliver an actual email.

    So my email-in-a-box type self hosted set up was fine really. Compliant you might say. But to send emails to this one in a thousand recipient I had to investigate what was going on and reconfigure things to ensure their server would interact with mine.

    Another thing that can happen is that spammers just put your email address in the “from” field and fire off a few million emails. Obviously the DKIM signatures and SPF won’t match but it still just makes your future legitimate emails look spammy. Having the credibility of a larger organisation goes a long way in this type of instance.


  • I’m absolutely in the “don’t self-host email” camp. That said, I think it could be done reliably if you wanted to use someone else’s SMTP server and let them worry about deliverability. As in, have your mx records on your domain route to your MTA and dovecot, but set your DKIM and SPF records to match a third party SMTP server. You could use mxroute as an SMTP server very cheaply. There are others like the email API type services. I still can’t think of why I’d want to self host with all this drama but just an idea I’ve heard.