John Levine said:
Depends what your intentions are. If you're trying to do listwashing, you
may wall see DNSBL listings rather than bounces. I like VERP just fine and
my lists use it, but I do get back FBL reports that are munged to the point
where I can't tell who complained. But they rarely munge the IP.
People trying to avoid listwashing will learn to munge the bottom bits of any
IPv6 address.
Similarly, DNSBLs could mask off the bottom bits of any IPv6 address that
they expose.
--
These are my opinions. I hate spam.
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