Spamhaus blocking sites not on block list?

Seemingly out of nowhere after literally over a decade of using Spamhaus with no issues, people were having issues sending to us. Their emails were getting flagged as spam – or at least so it would appear to them – they were receiving rejection notices saying that our email server rejected their message as spam. When I combed through our server logs, I noticed the error message actually¬†seemed¬†to indicate that the spamhaus service was unavailable and that’s why it was rejecting mail:

Remote Server returned '550 5.7.350 Remote server returned message detected as spam -> 554 5.7.1 Service unavailable; Client host [] blocked using'

You’ll notice it says “detected as spam” but it also does specifically say: “service unavailable.” So what gives?

Well, thankfully, the geniuses over at recently posted an article and have asked for help spreading awareness of an issue, so that’s precisely what I’m here to do. Spamhaus has made the horrible decision to no longer accept DNS requests from the most common DNS servers. In other words, if your mail server is configured to use something like Google’s, or Cloudflare’s, there’s a good chance that your request is simply going to get rejected. This, in turn, will cause your server to receive a “service unavailable” message like the one above, which will force it to send a rejection notice to the original sender.

Why was I impacted by this “seemingly out of nowhere?” Because I had recently switched my DNS settings to use Surprise!

You can fix this quickly by switching, painful as it may seem, to your local ISP’s normal DNS entries, or there are ways you can see if you can have your server’s IP address added to a sort of approved list for low volume senders.

Apple is blowing it with this charging port fiasco

Stanley Ng

I’ve never been much of an Apple guy. The only Apple product I’ve personally owned was a used Mac Mini that I bought just so I could be a little more knowledgeable about helping people troubleshoot Mac problems. But when the European Union said that Apple had to ditch their custom charging port and make it “Common Charger” USB-C port, I feel like Apple missed a golden opportunity.

Continue reading “Apple is blowing it with this charging port fiasco”

How To Add Safe Mode & Safe Mode w/ Command Prompt to Windows Boot Options

I recently ran in to a VERY frustrating issue trying to get a Windows 10 computer to boot in to safe mode when the main OS kept freezing up. Modern Windows will “fall back” to safe mode if it detects problems booting, otherwise you’re supposed to enter a hidden boot menu from inside the operating system. But if the OS boots normally and then locks up, it can be difficult to boot to safe mode.

Unlike the olden days of Windows 95 you can’t press F5, or Windows XP just press F8 – so I decided to bring a more thorough boot menu BACK to modern Windows on all my personal computers. This can be done through the Boot Configuration Data editor tool, BCDEdit.

Safe Mode added, and verified
Continue reading “How To Add Safe Mode & Safe Mode w/ Command Prompt to Windows Boot Options”