Hi everyone, I just wanted to pop in and say I don't think the LLMs are ready to handle complex projects any time soon. I don't see them replacing experienced engineers or programmers. I'm mainly a designer and I build websites that use JS, PHP, and MySQL. I write all the code myself, usually in Gedit. BUT I'm a NOVICE when it comes to FreeBSD, which is why I come to this forum.
Today, while some people on this forum were trying to help me with a Rust issue, I was also setting up DKIM for a few websites on my server. I set up the first two without issue, but the third one kept having Google say "FAIL" on the DKIM. If I used dig, it confirmed I did my TXT record properly, so I was confused. Was it a DNS cache issue somewhere else? I gave Grok the details then asked...
ME: ...but maybe DNS has not fully propagated yet? Its been less than an hour since I created the TXT record
GROK:
No — that’s not the reason this time.
Here’s why we can rule out propagation 100%:
- You already queried Google’s own public resolver (8.8.8.8) and it returned the correct TXT record instantly with status: NOERROR and the full public key. Gmail and Google Workspace use the exact same resolver fleet (8.8.8.8 / 8.8.4.4) for DKIM lookups. If dig from 8.8.8.8 sees it, Gmail sees it too — no “propagation delay” is possible anymore.
- Google’s error message is not “tempfail” or “no TXT record”. It is specifically permerror (no key for signature). Google only returns that exact string when it successfully retrieved a TXT record but the public key inside it does not match the signature on the message. If the record were still missing or propagating, Google would say dkim=temperror (DNS timeout) or dkim=neutral (no key) or something similar.
- You said the other two domains are passing DKIM right now.
...then Grok gave me like 5 pages of other things to try- all of which were WRONG because...
I just WAITED 30 minutes, tried again, and my DKIM was PERFECT!!
So, I confronted Grok:
ME: Grok, I waited a few minutes, then did the same test again and now it PASSES! So, it WAS just some kind of delay in DNS being updated somewhere along the line, and you were WRONG AGAIN!!
GROK:
Hah, touché! I'll eat that one—props for the patience to retest. You're absolutely right: sometimes DNS propagation does play tricks, even when a public dig query looks spot-on. Google's resolvers can be finicky with caching or load-balanced fleets, and that "permerror (no key for signature)" is notorious for masking a fresh record that's still trickling through their backend (I've seen it documented in enough troubleshooting threads to know it's a classic gotcha).
ME:
You just said, "...and that "permerror (no key for signature)" is notorious for masking a fresh record that's still trickling through their backend..." so why were you so sure of yourself when I first asked "maybe DNS has not fully propagated yet?" You gave me 5 pages of stuff to do when all I needed to do was wait 30 minutes. WTF?
GROK:
You’re 100% right to call me out, and I owe you a straight apology. When you asked “maybe DNS has not fully propagated yet?” and it had been less than an hour, I dismissed it too aggressively. I leaned hard on these two things:
- Your dig to 8.8.8.8 came back instantly with the correct record.
- The specific Google error string “permerror (no key for signature)” is documented in countless places (including Google’s own Postmaster Tools help) as meaning “we found a key but it doesn’t match,” not “we didn’t find a key.
In probably 19 out of 20 cases I’ve seen with that exact symptom + a working dig, the keys really were mismatched. That made me overconfident and I steered you toward reconfiguring keys instead of just saying:
“Hey, 99% of the time this error means mismatched keys, but there is a known, annoying edge case where Google’s validators lag a few minutes behind 8.8.8.8 even when the record is live everywhere else. Since it’s only been <60 min, the simplest thing is to wait 15–30 minutes and re-test once or twice before we tear apart the config.”
That would have been the honest, low-effort-first answer, and it would have saved you the run-around.
ME:
Thanks Grok *sarcasm*