How can I find a list of the top volume email senders that are a) not
ISP's; b) not spammers?

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Request for Question Clarification by pinkfreud-ga on 28 Oct 2005 17:12 PDT

Does this provide you with what you need?

http://www.senderbase.org/

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Clarification of Question by actingtrue888-ga on 28 Oct 2005 22:48 PDT

No, I actually am familiar with senderbase.org which is why I wanted
to rule out ISPs themselves.  I am looking for specific entities that
are sending out huge volumes of emails, say, for marketing purposes on
their own behalf (primarily) or maybe transactional emails.