Waterfall enrichment
Trying providers in sequence until one returns a hit. A miss that costs nothing is what makes a provider cheap to place early in the waterfall.
Trying providers in sequence until one returns a hit. A miss that costs nothing is what makes a provider cheap to place early in the waterfall.
Also see: Hit rate
Ready to try it on a real list?
Trying providers in sequence until one returns a hit. A miss that costs nothing is what makes a provider cheap to place early in the waterfall.
Get startedRelated
- Hit rate — cold email glossary
The share of lookups that return a usable address. Compare it with the false-positive rate; a high hit rate that includes catch-alls reported as verified is not a hit rate.
- Cold email & deliverability glossary
Plain-language definitions for the terms that come up in cold outreach and email deliverability: bounce rate, catch-all, SPF/DKIM/DMARC, sender reputation, and more.
- Bounce rate — cold email glossary
The share of sent emails a mail server refuses to deliver. A hard bounce means the mailbox does not exist; a soft bounce means it is temporarily unreachable.
- Hard bounce — cold email glossary
A permanent delivery failure: the mailbox does not exist, the domain does not accept mail, or the server has rejected the recipient for good. Hard bounces are the ones that wreck sender reputation.