Some of the services I'm interested in are:
ECOA (Email Change of Address)- Replaces undeliverable email addresses with current, working email addresses for your customers.
Email validation/cleansing/hygiene: (this is the most important one by far)- Identify which email addresses are deliverable or not (without sending an actual email the customer).
Get rid of bad email addresses with incorrect formats
Matching customer records to demographics info: (one company claims to do this)
So far I've glanced at:
miramax media (though they seem like they have no clue what they're doing from a phone call I had with them)
Thanks in advance!