What email list verification service do you prefer for purchased lists? The list came from ZoomInfo. Kickbox, HuBuCo, Briteverify, etc? Has anyone used EmailHippo?
I second Informatica (Strikeiron)
StrikeIron is great on the form level, validating in real time.
We used their service to clean up a 6 year database with soooo many invalid contacts.
We used Inboxpros and Informatica. It helped us flag invalids and spam traps
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