Are you sure your ipv6 ptr is set as well?
For providers that offer IPv6, you're right, you need to be able to set
your IPv6 rDNS, which rules out AWS. Fortuantely there are other
providers where that works.
R's,
John
--srs
________________________________
From: mailop <[email protected]> on behalf of John Levine via mailop
<[email protected]>
Sent: Friday, January 2, 2026 3:31:57 AM
To: [email protected] <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: [mailop] Notes from kernel.org admin about *Continuous degradation
of SMTP*
It appears that Daniel Roesen via mailop <[email protected]> said:
Hosting your own is a good thing against that.
Hosting your own puts you in the same if not worse spot than kernel.org
suffers from.
Hosting your own is fine if you are careful about where you host, preferably
some
place which blocks port 25 by default and you have to ask to get it unblocked.
I
would not try to host mail at Linode or Digital Ocean or Hetzner or OVH or other
large cheap VPS providers.
I recently helped the IETF move their mail to Panix, whose mail policy is like
that,
and they have no problem getting their mail accepted.
R's,
John
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Regards,
John Levine, [email protected], Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly
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