Instantly Email Verification
Verify your lists before you load them into Instantly. Connect your Instantly account, verify every email address, and push clean results back, all automatically.
Instantly is a cold email platform built for high-volume outreach with inbox rotation. Mailthentic integrates directly with Instantly to help you verify and clean your contact database without CSV exports or manual work.
How It Works
Four steps to a clean Instantly database.
Connect Instantly
Paste your API key once to connect. No password sharing.
Import contacts
Pull contacts or lists from Instantly. Duplicates are removed automatically.
Verify every email
Each address runs through the 9-point engine including SMTP mailbox confirmation, catch-all and disposable detection.
Push results back
Clean results sync back to Instantly. Invalid contacts are tagged so you can exclude them from campaigns.
Why Verify Your Instantly Contacts
Protect sending accounts
Bounces from cold email burn your sending accounts and domains. Verify first.
Improve inbox placement
Clean lists keep your bounce rate low so more outreach lands in the inbox.
Avoid spam traps
Verification removes risky addresses that trigger blacklisting.
Bulk or API
Verify whole lists before import, or check addresses via the API.
Frequently asked questions
How does Mailthentic connect to Instantly?
Does verification send emails to my contacts?
How much does it cost?
More Integrations
Clean your Instantly contacts today
Start with 1,000 free verification credits. No credit card required.