> On 2026-10-27 at 09:14:50 UTC-0400 (Tue, 27 Oct 2026 18:44:50 +0530)
> Manu Sharma <[email protected]>
> is rumored to have said:
>
> > So this looks like a reputation block on these specific addresses
> > (DigitalOcean space) rather than a problem with our mail as a whole.
>
> That's certainly why the mail systems I help manage reject all traffic
> from 157.230.0.0/16 and 167.99.0.0/16. DigitalOcean is too tolerant of
> spammers and other miscreants. I have never had any reason to punch
> holes in those blocks.
We have the same problem with those and other ranges owned by many
cloud service providers -- nearly all we ever see from them is spam.
I suspect it's a mixture of virtual machine operators sending spam
intentionally, and others running exploitable systems (possibly due
to incompetence?).
As I recall, some hosts in those ranges are spam sewers. We've made
a few exception for legitimate senders who are actively looking to
move out of those bad "Network Neighbourhoods" that are in ranges
that earned positions in our block-and-forget lists (all positions
are treated equally).
For a more comprehensive list of IPv4 and IPv6 netblocks belonging
to DigitalOcean, someone on GitHub named "femueller" has been
curating a list in CSV format (updated last year), here:
GitHub: Cloud IP ranges -- DigitalOcean (CSV format)
https://www.github.com/femueller/cloud-ip-ranges/blob/master/digitalocean.csv
The entire project has a handful of major providers. I recommend
not expecting frequent updates since netblocks tend to be stable for
long periods (in terms of years or decades).
> You may wish to reconsider your choice of vendors.
Unless said vendors clean up their networks, of course ... if you
label this as "wishful thinking," I shall not protest. ;)
--
Postmaster - [email protected]
Randolf Richardson, CNA - [email protected]
Inter-Corporate Computer & Network Services, Inc.
Vancouver, Beautiful British Columbia, Canada
https://www.inter-corporate.com/
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