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Instantly Email Verification Integration
Clean your Instantly contacts with Mailthentic to cut bounces and protect sender reputation. A native Instantly connector is available on request, and you can verify your list today.
Native connectors are built on request for customers on a paid plan.
Why verify your Instantly lists
Instantly is built to send at volume across many mailboxes, which means an unverified lead list spreads bounces across every sending domain you own. Cold traffic has no engagement history to absorb that, so a bounce spike moves straight into blacklisting and mailbox suspension. Verifying leads before upload is the single cheapest way to keep an outbound program alive.
Instantly is a cold email platform for scaled outbound, with unlimited mailbox connections, automated warmup and multi-inbox rotation. High sending volume means a bad list does damage quickly.
How Instantly verification works
Verify your Instantly list today in three steps.
Export your Instantly leads as a CSV
In Instantly, open the lead list or campaign audience you want to clean and export those leads as a CSV file.
Upload the CSV to Mailthentic's bulk verifier
Drop the file into the bulk verifier. Every address is checked for syntax, domain and MX validity, disposable and catch-all domains, role accounts and risk.
Download the clean list and import it back into Instantly
Upload only verified leads into your campaign. Want to skip the CSV round trip? Paid customers can request a native Instantly integration and our team builds it for you.
Want to skip the CSV step? Request the native Instantly integration and our team builds it for you.
Benefits for Instantly users
Keep your sending domains off blacklists
Bounce rates on cold traffic are watched closely. Verify before upload and you never give a blocklist a reason to list your domains.
Protect every mailbox in the rotation
Instantly rotates across many inboxes, so one dirty list can get several mailboxes throttled or suspended at once.
Preserve the value of warmup
Weeks of warmup can be undone by a single bounce-heavy campaign. Clean lists protect the reputation you paid to build.
Save sending capacity
Daily send limits are finite. Every email sent to a dead address is a slot that could have reached a real prospect.
Better inbox placement and reply rates
Lower bounce rates keep domain reputation high, which puts more of your campaign in the primary inbox where replies happen.
GDPR aligned processing
Verification runs under a GDPR aligned process with a DPA available on request, which matters when you prospect into Europe.
What Mailthentic checks
Every Instantly contact runs through the full verification stack.
Syntax validation
Catches malformed addresses and pattern-guessed leads that scraping and enrichment tools produce in bulk.
Domain and MX record checks
Confirms the prospect's company domain resolves and still accepts mail, so dead companies never enter your campaign.
Disposable email detection
Flags throwaway domains hiding in scraped lead data before they cost you a send slot and a bounce.
Catch-all domain detection
Flags domains that accept everything, so you can send them from a separate mailbox pool instead of risking your best domains.
Role-based address flagging
Marks info@, admin@ and support@ addresses, which drive spam complaints in cold outreach and rarely convert.
Risky and invalid address detection
Separates dead mailboxes from risky ones so your Instantly campaigns only spend reputation on addresses worth reaching.
Instantly use cases
Verifying scraped or bought lead lists
Bulk lead sources are full of guessed addresses. Verify before you upload a single lead into Instantly.
Protecting freshly warmed domains
New domains have no reputation buffer at all. Only feed them verified leads while they build trust.
Recovering after a bounce spike
If a campaign bounced hard, verify the remaining leads before you resume so the damage stops immediately.
Agency client onboarding
Verify a client's list before running it through your own infrastructure, so their bad data never costs you your domains.
Frequently asked questions
Is there a native Instantly integration?
How do I verify my Instantly list today?
How much do bounces really hurt a cold campaign?
What do I do with catch-all domains?
Is my lead data secure?
How do credits work?
Clean your Instantly list today
New accounts get 1,000 free verification credits. CRM integrations are included with any paid plan.