Probably not, although I'm waiting for ESPs to figure out that if they
send every message from a different IP,
I thought of that but I wouldn't be surprised to overflow the router's
ARP table
Well, yes, if you configure stuff in a naive way. I'd route an entire
/64 to the mail server, and configure the server as its own router
with all of those IP addresses internally forwarded to a single IP
that talks to the outside world. If you wanted to do IP hopping,
it wouldn't be hard to do.
it'll be much easier to process bounces and complaints since all
they'll need is the IP to figure out what the list and address was.
Is it? For mailing-lists, I think VERP is simpler and more robust.
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.
R's,
John
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