[Discuss] Email error after changing DNS servers?

[dbarrett at blazemonger.com (Daniel Barrett)]

Hi folks,

I recently changed DNS servers to mitigate the "sitting duck" security hole:

  https://krebsonsecurity.com/2024/07/dont-let-your-domain-name-become-a-sitting-duck/

Since the change, I sometimes receive a diagnostic email from Google
that (to my eye) indicates a DNS-related problem for mail I send to
Google recipients:

  https://blazemonger.com/d/example-error.txt

Does anything look obviously wrong with my DNS (below)? I am not an
expert. I changed servers about 48 hours ago so hopefully the change
has propagated by now.

# New nameservers:
$ host -t ns blazemonger.com
blazemonger.com name server salvador.ns.porkbun.com.
blazemonger.com name server curitiba.ns.porkbun.com.
blazemonger.com name server maceio.ns.porkbun.com.
blazemonger.com name server fortaleza.ns.porkbun.com.

# My domain:
$ host blazemonger.com
blazemonger.com has address 67.23.254.249
blazemonger.com mail is handled by 0 mail.blazemonger.com.

# My incoming mail server
$ host mail.blazemonger.com
mail.blazemonger.com has address 67.23.254.249

# My SPF record:
$ host -t txt blazemonger.com
blazemonger.com descriptive text "v=spf1 ip4:67.23.254.249 +a +mx +ip4:72.29.78.191 +include:spf.mfilter.dimenoc.com ~all"

# My DMARC record:
$ host -t txt _dmarc.blazemonger.com
_dmarc.blazemonger.com descriptive text "v=DMARC1; p=none; rua=mailto:admin at blazemonger.com"

Thank you for any advice.
Dan