"You said the list was verified and I got 8% bounces" is a fair complaint, and the answer matters for every buyer of lead data. Verification and deliverability are related but different things. Here is how Apex Automation Team explains it to clients.
What verification can and cannot prove
SMTP verification confirms a mailbox exists at send time. It cannot detect catch-all domains (the server accepts everything), mailboxes that fill or get disabled later, or spam traps that deliberately accept mail. That is why we tag rows as valid, risky (catch-all/unknown) or invalid, and publish the valid rate per database rather than promising 100%.
Freshness
Creator and seller emails churn. Historical packs are cheaper; fresh packs are re-scraped and re-verified on order. If deliverability matters more than price, buy fresh.
Sending hygiene
- Warm up new domains and mailboxes for 2–4 weeks before campaigns.
- Send valid rows first; send risky rows in small batches from a secondary domain, or not at all.
- Keep daily volumes per mailbox modest and spread across mailboxes.
- Use suppression lists: bounces, unsubscribes and previous complaints never get emailed again.
- Personalise — generic blasts get flagged regardless of list quality.
How our lists are built
Read how verified lead databases are built for the full pipeline. Our creator databases verify at roughly 92–95% valid; seller directories are enriched with store links and business websites.
We also automate the sending side — warmed mailboxes with suppression checks, Smartlead/HubSpot syncs — as part of workflow automation. Ask for a sample and a deliverability plan.
Quick checklist
- Buy fresh packs when deliverability matters most
- Send valid rows first, risky rows in small batches
- Warm up new domains and mailboxes for 2–4 weeks
- Maintain suppression lists for bounces and unsubscribes
- Personalise — generic blasts get flagged
Frequently asked
What is a catch-all domain?
A mail server that accepts every address; verification cannot confirm the mailbox exists, so we tag these rows as risky.
Do you replace invalid rows?
Rows tagged valid that bounce shortly after delivery are replaced or credited — ask for the current policy when ordering.