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DNS Propagation - severe delay

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Rising Star
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Registered: ‎05-11-2008

DNS Propagation - severe delay

Hi, hoping there is someone here who has some experience of this. I made changes to the MX records for a domain on 17th August 2020. A month later there are still DNS servers throughout the world that are showing the old MX records, see https://dnschecker.org/#MX/lighthouseprojectcrawley.org

Anything showing 0:lighthouseprojectcrawley.org has still not caught up with the change, which was done when the domain was converted to use G Suite. I am used to changes taking a day or two to propagate but this is ridiculous. The TTL value on the records is 3600. Is there anything I can do to resolve this?

Thanks

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Rising Star
Posts: 998
Thanks: 11
Fixes: 1
Registered: ‎05-11-2008

Re: DNS Propagation - severe delay

Right, I now know why this is happening, there is a discrepancy between the results being returned by the two authoritative name servers. I just need to work out how to fix it ...

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Community Veteran
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Registered: ‎01-08-2007

Re: DNS Propagation - severe delay

one of the authoritive nameservers probably missed the zone update somehow. If it were me i'd change the mx record temporarily and then change it back. Hopefully it'll get through to all the authoritive NS's.

I need a new signature... i'm bored of the old one!
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Community Veteran
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Registered: ‎05-04-2007

Re: DNS Propagation - severe delay

I agree with @7up 

Change it to something else, see if it works. You can always do an MX 10 (the server you want it to be), or an MX 20 (worst case it will still go there).

If all goes well, then change it back.

That's how I have my e-mail hosted, stressful - but good fun when you get it right.

EDIT: 48 hours for DNS changes to take effect, so two days.

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Rising Star
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Registered: ‎05-11-2008

Re: DNS Propagation - severe delay

Thanks for the responses, I had tried making a small change to see if that kicked it into action but it didn't work. I think the problem is that some of the nameservers are "stale" and not getting the updates. Anyway I have redelegated the name servers to 123.reg and made the changes there as I don't trust 365 Hosts to sort out a rather esoteric problem.

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Re: DNS Propagation - severe delay

DNS changes are always stressful, it can take 2 days to know if they've worked. If you make a mistake, all your e-mails bounce (not good for anyone). When they start going through to the new server, then you're happy.

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Rising Star
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Registered: ‎05-11-2008

Re: DNS Propagation - severe delay

Indeed they can be stressful. I set up the DNS yesterday and redelegated the name servers this morning. We're getting there but strangely dnschecker.org lags well behind whatsmydns.net in picking up the changes.

https://dnschecker.org/#NS/lighthouseprojectcrawley.org

https://dnschecker.org/#MX/lighthouseprojectcrawley.org

https://www.whatsmydns.net/#NS/lighthouseprojectcrawley.org

https://www.whatsmydns.net/#MX/lighthouseprojectcrawley.org

 

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Rising Star
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Registered: ‎05-11-2008

Re: DNS Propagation - severe delay

And we're done, everything now propagated and working correctly. 😀

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Community Veteran
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Re: DNS Propagation - severe delay

I use afraid.org's freedns service to manage my dns. It's reliable and lets you setup whatever records you want giving you fuller control than most registrars will.

I need a new signature... i'm bored of the old one!
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Rising Star
Posts: 998
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Registered: ‎05-11-2008

Re: DNS Propagation - severe delay

@7up Thanks, but I don't think I'd be happy with the free service and there is little point in paying for something I don't have to.

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Posts: 15,275
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Re: DNS Propagation - severe delay

Although the free service does have some set backs, it's incredibly reliable. It also allows you to change your dns settings far quicker and easier. It's not for everyone but i thought i'd mention it.

I need a new signature... i'm bored of the old one!