# Instantly.ai Email Verification (<1.5% Bounce) | MailVeri

> Verify outbound lead lists before importing to Instantly.ai. Keep cold email bounce rates strictly under 1.5%, protect warmup domains, and pay only $59/100K.

- **Source**: https://mailveri.com/integrations/instantly
- **AI Reference**: https://mailveri.com/llms-full.txt

---

Cold Email Deliverability • Keep Bounces Under 1.5%

Importing unverified B2B lists directly into Instantly burns weeks of inbox warmup in a single afternoon. Scrub your CSV exports or automate pre-send API verification with MailVeri to isolate `VALID` mailboxes and cut verification costs by up to 90%.

[Clean 1,000 Leads Free](https://app.mailveri.com/accounts/signup/) · [View Setup Workflows](#step-by-step-guide)

Bulk CSV Upload (Up to 1M rows) · Catch-All & Full-Inbox Detection · Non-Expiring Pay-As-You-Go Credits

< 1.5%

Target campaign bounce rate

$59

Cost per 100K verified leads

100%

Instant refund on Unknown results

## Why Raw Lead Lists Destroy Instantly.ai Deliverability

Inbox warmup builds baseline sender reputation, but it cannot override a 6% hard bounce spike on a live campaign.

### The 2% Provider Ceiling

Google Workspace and Microsoft 365 monitor outbound NDR (Non-Delivery Report) ratios per sending domain. Exceeding a 2% bounce rate routes cold emails straight to the spam folder across all mailboxes on that domain.

### Catch-All Deferred Bounces

Over 30% of B2B domains operate as catch-all servers that accept every recipient during an initial check and send a delayed bounce hours later. MailVeri flags `CATCH_ALL` domains so you never mix them into primary campaigns.

### Full Inbox & Role Filtering

Abandoned mailboxes that exceed storage quotas (`FULL_INBOX`) and shared group aliases (`ROLE_ACCOUNT`) hurt reply rates and trigger spam complaints. MailVeri isolates both automatically.

## Two Ways to Verify Leads for Instantly.ai

Clean bulk CSV lists before campaign upload or gate your automated lead pipelines in real time via API.

### Workflow A: Pre-Import Bulk CSV Cleaning (Zero Code)

Best for SDR teams and agencies importing leads from Apollo, Sales Navigator, or Clay CSV exports

1

#### Upload Raw CSV

Upload your raw prospect CSV into the [MailVeri Dashboard](https://app.mailveri.com/dashboard/). All custom personalization columns (First Name, Icebreaker, Company) stay intact.

2

#### Export Deliverable Segment

Download the filtered CSV containing strictly `VALID` contacts for your primary warmup domains.

3

#### Import to Instantly

In Instantly.ai, open **Campaigns → Leads → Import CSV**, map your fields, and enable *Check for duplicates across workspace*.

[Clean CSV for Instantly Now](https://app.mailveri.com/dashboard/)

### Workflow B: Real-Time API Gate Before Instantly API v2

Best for automated pipelines in [n8n](https://mailveri.com/integrations/n8n), [Make](https://mailveri.com/integrations/make), [Zapier](https://mailveri.com/integrations/zapier), or [Clay](https://mailveri.com/integrations/clay)

Before calling Instantly's `POST /api/v2/leads` endpoint, verify each prospect via MailVeri's real-time API and only push contacts that return `status === "VALID"`:

1. Verify Prospect via MailVeri API (Request) · Real-time verification check

```http
POST https://api.mailveri.com/v1/verify-mail/
Authorization: Bearer YOUR_MAILVERI_API_KEY
Content-Type: application/json

{
  "email": "jordan.taylor@scaleops.io"
}
```

2. MailVeri Verification Response (Filter Gate) · Proceed only if status === "VALID"

```json
{
  "error": 0,
  "message": "Verified jordan.taylor@scaleops.io successfully",
  "status": "VALID",
  "email": "jordan.taylor@scaleops.io",
  "mail": "jordan.taylor@scaleops.io",
  "is_disposable": false,
  "is_role_account": false,
  "is_catch_all": false,
  "is_full_inbox": false,
  "balance": 49990
}
```

3. Push Verified Contact to Instantly API v2 · Zero bounces in your active campaign

```http
POST https://api.instantly.ai/api/v2/leads
Authorization: Bearer YOUR_INSTANTLY_API_KEY
Content-Type: application/json

{
  "campaign": "INSTANTLY_CAMPAIGN_UUID",
  "email": "jordan.taylor@scaleops.io",
  "first_name": "Jordan",
  "last_name": "Taylor",
  "company_name": "ScaleOps",
  "skip_if_in_workspace": true
}
```

## Instantly List Verification Cost Comparison

Stop paying steep markups on bundled verification credits. Compare MailVeri's pay-as-you-go rates for 100,000 cold email leads:

| Provider | Cost per 100K Leads | Cost per 1M Leads | Credit Expiration |
| --- | --- | --- | --- |
| MailVeri (Bulk CSV & API) | $59 | $299 | NEVER ExpireLifetime |
| Bundled Sequencer Verification | $200 – $250 | $1,500+ | Tied to Monthly Plan |
| NeverBounce | $400 | $2,500 | Expires in 12 Months |
| ZeroBounce | $649 | $3,199 | Expires in 2 Years |

Outbound Deliverability Playbooks

## Related Guides for Instantly.ai Senders

[Step-by-Step Guide — How to Verify Emails Before Sending in Instantly & Smartlead (Keep Bounce Rate Under 1.5%) — Learn the 3-tier lead routing matrix for VALID, CATCH_ALL, and FULL_INBOX segments.](https://mailveri.com/blog/how-to-verify-emails-instantly-smartlead-bounce-rate) · [Lead Sourcing — Why Apollo “Verified” Emails Still Bounce (And How to Fix It) — Why cached B2B database badges still produce 8%–18% hard bounces on cold campaigns.](https://mailveri.com/blog/why-apollo-verified-emails-still-bounce) · [Clay Automation — How to Verify Emails in Clay Using HTTP API: Save 80% on Waterfall Credits — Verify Clay waterfall leads for 0 Clay credits before pushing to Instantly.ai.](https://mailveri.com/blog/how-to-verify-clay-waterfall-enrichment-emails-http-api) · [2026 Cost Audit — MillionVerifier Pricing & Alternative: Save 33%–77% on Bulk Lists — Compare MillionVerifier ($149/100K, $449/1M) against MailVeri ($59/100K, $299/1M) with unconditional Unknown refunds.](https://mailveri.com/blog/millionverifier-pricing-alternative) · [High-Volume Outbound — Reoon Email Verifier Alternative: Lifetime Credits vs. Daily Caps — Why Instantly senders switch from Reoon ($972/1M) to MailVeri ($299/1M) and save $673 per 1M.](https://mailveri.com/blog/reoon-email-verifier-alternative) · [Catch-All Economics — BounceBan & Scrubby Alternative: Verify Catch-All Leads at 1 Credit Flat — Stop paying $300–$800 per 100K or waiting 72 hours for catch-all verification.](https://mailveri.com/blog/bounceban-scrubby-catch-all-verification-alternative)

## Frequently Asked Questions

Common questions about cleaning lead lists for Instantly.ai cold email campaigns.

### What bounce rate should I target in Instantly.ai?

Keep your campaign bounce rate strictly below **1.5%** (and never above Google Workspace and Microsoft 365's 2% enforcement ceiling). Importing only MailVeri `VALID` contacts keeps typical cold outreach bounce rates between 0.4% and 1.2%.

### Should I import Catch-All emails into Instantly?

Never mix `CATCH_ALL` addresses into your primary warmup domains. If you choose to contact high-value catch-all prospects, isolate them into a dedicated secondary domain pool capped at 15–20 emails per day per inbox.

### Does MailVeri preserve custom CSV columns like AI icebreakers?

Yes. When you upload a CSV to MailVeri, every original column (First Name, Company, Website, Custom Variables, AI Icebreakers) is 100% preserved and appended with MailVeri's verification status columns.

## Ready to protect your Instantly.ai domains?

Sign up in 30 seconds and get 1,000 free verification credits to clean your next Instantly campaign list.

[Get 1,000 Free Credits](https://app.mailveri.com/accounts/signup/) · [View Smartlead Guide](https://mailveri.com/integrations/smartlead)

Explore: [Smartlead.ai](https://mailveri.com/integrations/smartlead) · [Apollo.io](https://mailveri.com/integrations/apollo) · [Clay](https://mailveri.com/integrations/clay) · [Outbound Agencies](https://mailveri.com/industries/outbound-agencies) · [Pricing ($59/100K)](https://mailveri.com/pricing) · [Compare 36 Verifiers →](https://mailveri.com/compare)

## Explore Related Verification Benchmarks, Integrations & Deliverability Hubs

Compare live 10K–5M verification rate cards, connect MailVeri to your outreach stack, or inspect domain-level SMTP rules.

Verifier Comparisons

[All 36 →](https://mailveri.com/compare)

- [MailVeri vs QuickEmailVerification100K checks: $59 vs $320](https://mailveri.com/compare/mailveri-vs-quickemailverification)
- [MailVeri vs Findymail100K checks: $59 vs $849/mo](https://mailveri.com/compare/mailveri-vs-findymail)
- [MailVeri vs ExactVerify100K checks: $59 vs $220](https://mailveri.com/compare/mailveri-vs-exactverify)
- [MailVeri vs EmailListVerify100K checks: $59 vs $186](https://mailveri.com/compare/mailveri-vs-emaillistverify)
- [MailVeri vs Validity BriteVerifyCompare 10K–1M pricing & accuracy](https://mailveri.com/compare/mailveri-vs-briteverify)
- [MailVeri vs Verifalia100K checks: $59 vs $389](https://mailveri.com/compare/mailveri-vs-verifalia)

CRM & Stack Guides

[All 13 →](https://mailveri.com/integrations)

- [Google Sheets Apps ScriptVerify cells directly in Sheets](https://mailveri.com/integrations/google-sheets)
- [Klaviyo & Shopify HygieneCut active profile overpayments](https://mailveri.com/integrations/klaviyo)
- [Clay.com HTTP API Waterfall0 Clay credits ($59 per 100K)](https://mailveri.com/integrations/clay)
- [n8n Self-Hosted WorkflowsAutomated HTTP Request node](https://mailveri.com/integrations/n8n)
- [HubSpot Marketing Contacts AuditPrevent 3% CRM bounce locks](https://mailveri.com/integrations/hubspot)
- [Zapier No-Code VerificationFilter invalid leads before CRM](https://mailveri.com/integrations/zapier)

Solutions & Free Tools

[All Tools →](https://mailveri.com/tools)

- [Non-Profits & FundraisingNon-expiring PAYG donor cleaning](https://mailveri.com/industries/nonprofits)
- [ESP Overpayment CalculatorMeasure wasted CRM contact costs](https://mailveri.com/tools/esp-overpayment-calculator)
- [Free Email Verifier ToolInstant live deliverability check](https://mailveri.com/tools/email-checker)
- [Domain Reputation CheckerAudit SPF, DKIM, DMARC & MX health](https://mailveri.com/tools/domain-reputation)
- [DNS MX Record LookupInspect mail exchange priority](https://mailveri.com/tools/mx-lookup)
- [AI Startups & Indie HackersOutbound + trial token shield](https://mailveri.com/industries/ai-startups)

Glossary & Domains

[Glossary](https://mailveri.com/glossary) · [Domains →](https://mailveri.com/domain)

- [Soft BounceBounces & SMTP Signals definition](https://mailveri.com/glossary/soft-bounce)
- [Verification ResultVerification & Address Types definition](https://mailveri.com/glossary/verification-result)
- [DMARC (Domain-based Message Authentication)Authentication & DNS definition](https://mailveri.com/glossary/dmarc)
- [hubspot.com B2B Domain ProfileEnterprise CRM MX & SPF check](https://mailveri.com/domain/hubspot.com)
- [clay.com GTM Domain ProfileB2B corporate MX & catch-all rules](https://mailveri.com/domain/clay.com)
- [aol.com Mail DeliverabilityYahoo/AOL MX & complaint limits](https://mailveri.com/domain/aol.com)