[arin-ppml] spam originating from IANA special-use blocks.

[Rob Seastrom]

Jo Rhett <jrhett at netconsonance.com> writes:

> I am starting to see widespread spam from IANA special-use
> blocks. Is it necessary for use to change policy for these blocks to
> be delegated appropriately with specific contact information, or is
> this something that ARIN can do on its own without a policy change?

It is already documented; you can look up the specific IPv4 associated
with the 6to4 IPv6 address you got the spam from.

https://en.wikipedia.org/wiki/6to4#Address_block_allocation

> The block in question is the 6to4 block:
> 	2002::/16  NetName: IANA-V6-6TO4

If you blocked port 25 from that entire /16 (but allowed 587 and maybe
465 if you support that), I'll wager in practical terms you'd never
see a complaint related to legitimate mail.

-r