Am 29.09.26 um 09:26 schrieb ndrs via mailop:
Any comment to this?
On Saturday, September 19th, 2026 at 5:14 AM, ndrs via
mailop<[email protected]> wrote:
I have decided to not accept any SMTP connections from the Google cloud
infrastructure (AS396982).
I block them completely on my system. There is nothing good inside that
infrastructure.
Note, that they have two AS assigned tho their cloud infrastructure:
- AS396982
- AS19527
How can you do that confidently? Some names in that AS that jump out at me
include the following list. Have you confidently documented that no good mail
comes out of that AS before blocking? Why not block any host identified as
googleusercontent.com instead? Do you service a variety of users who want mail
from lots of different places?
Sorry, a bit late - I do think there is a difference in usage between those two, that's why I'm explicitly blocking
AS396982 (which covers the *.googleusercontent.com crap as well as some other stuff) and not AS19527.
I'd like to know which of the mentioned companies use which IP addresses for which purposes. If they host web-accessible
stuff there I don't care, that's not within scope for me. A general "some of these reputable companies use Google cloud
services for something" is not a convincing argument. And sorry, I cannot really be bothered at the moment to research
that information, normally the onus for that is on those who make a claim :-)
Cheers,
Hans-Martin
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