There is a growing stream of spam being emitted from 64.170.98.32.
This appears to be the outbound server for IETF mailing-lists. Some
of the spam has had headers added that indicate the message was
originally received from an open relay or an IP address on several
block-lists (with much of it encoded unicode). The messages
identified as spam have included the original message content. This
is creating a problem where receiving messages from the IETF is less
reliable.
Postmaster@ has been copied. Redacted examples are available upon
request.
-Doug
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