Verify your contacts before importing into Brevo

Why Brevo watches your bounce rate so closely

Brevo is an all-in-one email, SMS, and automation platform. Like every shared-infrastructure ESP, it protects the sending reputation of its whole customer base, which means it is strict about individual senders whose bounce and complaint rates rise. Brevo can pause sending, require a list-cleaning step, or put an account under manual review when a campaign bounces heavily — and that review can freeze your marketing right when you need it running.

The addresses that trip those thresholds usually come in via imports: a spreadsheet handed over at a job change, a list from an old tool, or signups collected without a confirmation step. Even Brevo's double opt-in only confirms intent after the confirmation email is delivered — if the address is dead, that confirmation itself bounces. Verifying the raw list before you import it stops the bad addresses from ever counting against you.

Verifly probes each mailbox and returns deliverable, undeliverable, or risky with disposable, role, and catch-all flags. Import only the deliverable rows and Brevo sees a clean bounce rate from your first send, keeping your account out of review and your sender score healthy.

Verify before importing into Brevo

1. Export or gather the list as a CSV with an email column.
2. Register a free Verifly key at verifly.email/api/v1/autonomous/register: 100 credits, no card, no captcha.
3. POST the emails to /verify/batch, chunking large lists and merging the results.
4. Keep deliverable rows; drop undeliverable and disposable ones. Hold risky and catch-all rows for a cautious, separate send.
5. Import the clean CSV into Brevo and launch your campaign against verified contacts.

const emails = importList.map(r => r.email)

const res = await fetch('https://verifly.email/api/v1/verify/batch', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer vf_your_api_key',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({ emails }),
})

const { results } = await res.json()
const clean = results.filter(r => r.result === 'deliverable')
console.log(`Importing ${clean.length} verified contacts into Brevo`)