Your mailserver Your rules Are they supposed to care that you’re blocking them?
--srs ________________________________ From: mailop <[email protected]> on behalf of ndrs via mailop <[email protected]> Sent: Tuesday, 29 September 2026 12:56:19 To: ndrs <[email protected]> Cc: [email protected] <[email protected]> Subject: Re: [mailop] Attn: Cloudflare, Google, Telegram 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? > > Uber Technologies, INC > Cogent Communications > Groupon, Inc. > Priceline.com > Salesforce, Inc > FedEx > U.S. Dept. of Health And Human Services > The Dun & Bradstreet Corporation > Palo Alto Networks, INC > S&p Global Inc. > US U.S. Securities & Exchange Commission > Shopify, Inc. > The Home Depot Inc. > Federal Deposit Insurance Corporation > US Chicago Mercantile Exchange > Crowdstrike > Mailspike > Nokia of America Corporation > Ericsson Ab > Honeywell International Inc. > US Johnson & Johnson > Calix, Inc. > Dow Networks > Credit Karma, Inc. > Sendinblue > Cisco Webex LLC > _______________________________________________ > mailop mailing list > [email protected] > https://list.mailop.org/listinfo/mailop > _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
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