17 Aug
2021
17 Aug
'21
8:19 p.m.
The only thing that comes to mind immediately would be some kind of
misguided attempt to mitigate possible DOS attacks via white listing.
On 8/16/21 9:04 PM, Paul Koning wrote:
On Aug 16, 2021, at 6:36 PM, Mark <mwjr at
protonmail.com> wrote:
Mystery solved (or at least the mystery of no response) - I used to have some issues when
I ran authoratitive DNS and mail directly from our school's IP addresses rather than
an 'established' (big tech co) source
Why would that explain the failure to
answer DNS queries? DNS servers are supposed to answer queries from everyone. I've
never heard of failing to do so. FWIW, I just tried asking ns1.protonmail.ch about
mail.protonmail.ch, and it was happy to answer me (to my random Comcast client addresses,
IPv4 and IPv6 both work).
paul