Verify prospects before they enter an Outreach sequence

Why Outreach sequences need a verification gate

Outreach is a sequencing platform built for teams: reps add prospects to shared sequences, and Outreach automates the cadence of emails, calls, and tasks across everyone's connected mailboxes. Because sending is spread across a whole team's identities, a bad prospect list doesn't just bounce for one rep — it can degrade the reputation of every mailbox the sequence touches. Enterprise sending volume magnifies the cost of every dead address.

Prospects flow into Outreach from CRM syncs, imports, and manual adds, and none of those paths guarantee the email still resolves to a live mailbox. Titles change, people leave, and enrichment tools guess patterns that were never real. When a sequence steps through those addresses, the bounces land against your domain and Outreach's own deliverability dashboards start flashing.

Verifly adds a verification gate before the sequence: probe each address, return deliverable / undeliverable / risky with disposable, role, and catch-all flags, and only let clean prospects through. Your team's shared mailbox reputation stays protected and your Outreach bounce metrics stay in the green.

Gate prospects before adding to a sequence

1. Collect the prospects you're about to add — a CRM sync batch, an import file, or a saved list.
2. Get a free key at verifly.email/api/v1/autonomous/register (100 credits, no card, no captcha).
3. Send the addresses to POST /verify/batch. For a single high-value prospect, GET /verify works fine.
4. Filter out undeliverable results. For enterprise sending, be strict about catch-all and risky rows too.
5. Add only the deliverable prospects to your Outreach sequence.

const emails = prospectsToAdd.map(p => p.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 sequenceReady = results.filter(r => r.result === 'deliverable')
console.log(`${sequenceReady.length} prospects cleared for the Outreach sequence`)