ZapBounce and lemlist
lemlist's approach is heavy personalization: custom images, per-prospect variables, liquid conditions. Each of those costs something to produce, whether in enrichment credits or in a copywriter's time.
Sending all of that to an address that does not exist wastes more than a send. It wastes the work that went into the send.
Personalization makes a wasted send expensive
A generic cold email costs almost nothing per recipient. A lemlist campaign with a custom image, three enriched variables and a conditional sequence costs real money per prospect before it is sent.
When a third of the list cannot receive mail, a third of that production cost produced nothing, and the enrichment credits are already spent.
lemlist also sends from connected mailboxes, so the bounce reaches the sending account's reputation in the same way it does in any mailbox-based sender.
How the data moves
Verify before enrichment, not after
This is the ordering that saves money here. Enriching an address that does not exist spends credits on a prospect you cannot reach.
Store the verdict in a lemlist custom variable
Variables are usable in liquid conditions, so a sequence can branch on the verdict rather than sending regardless.
Use conditions to skip email steps
A prospect whose address is unconfirmable can still be worth a LinkedIn step in the same sequence. lemlist supports that natively.
Re-verify before a campaign restarts
A campaign paused for a month and resumed is sending to older data than the one you verified.
Setting it up
- Verify the raw lead list before any enrichment step runs.
- Drop invalid addresses before they consume enrichment credits.
- Import the remainder into lemlist with the verdict as a custom variable.
- Add liquid conditions so email steps are skipped for unconfirmable addresses.
- Route those prospects to the LinkedIn steps in the same sequence instead.
- Re-verify any campaign that has been paused for more than a few weeks.
lemlist: common questions
Verify before or after enrichment?
Before. Enrichment credits spent on a dead address are gone, and the verification costs a fraction of what enrichment does.
Can I skip email steps for unconfirmable prospects?
Yes, with a liquid condition on the verdict variable. They stay in the sequence for the LinkedIn steps.
Does lemlist verify addresses?
It offers a check. As with every bundled verifier, compare it on a sample and look at what it reports for accept-all domains.
Check a lemlist export today
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