I'm afraid that if I understand the situation correctly, the MXVerify result is not an non-error, it is a real problem, and the likely cause of your issue.
That serverfault link is unrelated, you are not sending emails only, this discussion is about your domain receiving email.
On Thu, Apr 29, 2021, 9:16 AM Trevor Cordes trevor@tecnopolis.ca wrote:
On 2021-04-28 Colin Stanners wrote:
It's putting the horse before the cart to look into blocklists etc before the e-mail domain is correctly configured...
Thanks for the tool links! I had thought about DNS issues. But literally no other host that I know of is having problems with me.
Doing resolver lookup for T=MX domain=``tecnopolis.ca'' Questionable: NO MX DATA: domain=``tecnopolis.ca'' We SIMULATE! Do have at least one MX entry added!
Ya, this is a non-error.
https://serverfault.com/questions/947145/is-an-mx-record-required-on-a-domai...
My box is just my box, it's the only external-facing box, and as such does not require a MX. However, if some pathologically stupid MTA doesn't know the RFC then I guess I'll setup a MX.
https://mxtoolbox.com/emailhealth/tecnopolis.ca/ 7 Problems
Category Host Result
dmarc tecnopolis.ca No DMARC Record found spf tecnopolis.ca No SPF Record found
This tool also sort of aggressive with its warnings. Kind of like SSL-setup tools moan about using invalid hashes, though 1-3% of the hits out there are on old browsers that require them.
I don't have dmarc and spf on purpose. Surely no MTA would that braindead to refuse to *send* to such a server?
dns tecnopolis.ca SOA Serial Number Format is Invalid
Can a dns client even get the SOA serial? How does it do that? Mine is set to a normal int within the expected range. Weird... I'll need to verify my server is actually spitting an invalid value out, once I figure out how mxtoolbox is reading that info and what value it saw.
dns tecnopolis.ca SOA Expire Value out of recommended range
Another non-error. My TTL is 1 week and mxtoolbox thinks it should be min 2 weeks.
So useful tools taken with many grains of salt (as are most), at least it gives me some ideas and I'll implement one by one and then see if Hilton can reach me.
Thanks!