EMAIL VERIFICATION
Every address, checked, before you ever hit send.
We verify every address on your list with its real mail server, at the mailbox, not just the spelling. Dead mailboxes, dead domains and anyone who's complained anywhere on the platform never make it into a campaign.
Verified at the mailbox, not just spelling
Plain-language reason for every removal
Real reachable count before you launch
THE PROBLEM
A list that looks fine can still wreck your reputation.
Every list decays. People change jobs, close inboxes, shut down domains. None of that shows up when you're scanning a spreadsheet for typos. The addresses still look correct. They just aren't there anymore.
Inbox providers punish hard bounces harder than almost anything else you can do wrong. Send to a batch full of dead addresses and the damage doesn't stay contained to that campaign. It slows delivery for every email you send after it, to people who were always going to open.
Most tools check that an address is formatted correctly. Spelling isn't the same as existing. A list can pass a spelling check and still fail the moment you press send, and by then it's a bounce on your record, not a problem you caught in time.
HOW IT WORKS
Checked at the mailbox, before you launch.
Verification runs the moment your list arrives, not after you've already queued a send.
Your list starts verifying on import
The moment your spreadsheet finishes uploading, every address begins checking against its receiving mail server. You don't wait for a separate scan.
Each address is tested at the mailbox
We ask the receiving server directly whether the mailbox exists. Spelling and format aren't enough on their own. This is the real test.
Dead and risky addresses are removed, with reason
Dead mailboxes, dead domains and anyone who's complained anywhere on the platform are pulled before your campaign ever sees them. Each one gets a plain-language reason.
You launch with the real reachable number
The count on your screen before you hit send is the number of addresses that will actually receive the email, not the number you imported.
IN DETAIL
Verification is one of four checks, not one.
A spelling check catches typos. It doesn't catch a mailbox that closed two years ago. Here's what happens before an address earns a place in your send.
Checked with the mail server, not just spelling
Every address is verified against its actual receiving mail server, at the mailbox level. That's the difference between an address that looks right and an inbox that exists and will accept mail today.
It's one of four layers of checking we run before a campaign goes out, so no single pass decides whether an address is safe.
A plain-language reason for every removal
Nothing disappears quietly. Every address we remove stays on your list, marked as removed, with the reason next to it, so your numbers always add up.
Your reachable count, before you launch
The number you see before you press send is the number of addresses that passed verification right then, while your list was still importing. No surprises after the fact.
Bounces prevented, not just measured
A report that tells you about bounces after they happen is a post-mortem. We stop the ones we can catch before they're sent, which protects every send that follows.
WHAT IT MEANS FOR YOU
A cleaner list changes what every send can do.
Verification isn't a feature you notice. It's the reason the rest of your campaign performs the way it should.
See the full systemYour reputation stops absorbing damage
Hard bounces are the fastest way to lose standing with inbox providers. Remove the dead addresses first and the sends that follow aren't paying for the sends that came before.
You stop paying to mail addresses that can't receive mail
Checking an address uses the same credit pool as sending it. Catching a dead mailbox before launch costs less than sending to it and recording the bounce.
You launch with a number you can trust
The reachable count on screen before you send is the real one, checked at the mailbox, not an estimate based on how the list looked when it was imported.
Your list keeps an honest record
Every removed address stays visible with its reason attached, so months from now you can still explain exactly why your list is the size it is.
It works the same whether you run it or we do
On Self-Serve the checks happen automatically as you import and send. On Done-For-You, our team acts on what's found, the same day.
COMPARED
Most tools check spelling. We check the mailbox.
Across the network: 99.6% of mail delivered, 10M+ emails sent every month, four or more layers of address verification, and a six-part system — Sender Shield, ISP Intelligence, Frequency Governor, Auto-Scale, Ghost Sweeper and Anti-Starvation Routing — that earns every new domain its reputation gradually.
A typical list-cleaning tool
- Flags addresses that look malformed, not ones that are dead.
- Checks your list once, whenever you remember to run it.
- Bounces show up in a report after the damage is done.
- Removed contacts just vanish from your count.
- Treats verification as a separate add-on to buy and manage.
- Says nothing about complaints logged elsewhere on the platform.
Yeti Outreach
- Tests the mailbox itself. Verifies with the real receiving mail server before a send.
- Starts on import. Verification runs the moment your list finishes uploading.
- Prevents the bounce. Dead addresses never enter the campaign in the first place.
- Keeps the record. Every removal stays on your list, marked with a plain-language reason.
- One pool, one system. Address checks draw from the same credits as sending, no second subscription.
- Platform-wide complaint check. Addresses that have complained anywhere on the platform never enter a new campaign.
QUESTIONS
What people ask about verification.
Why did my list get smaller after you cleaned it?
Some addresses no longer have a working mailbox. Each one is marked with the reason, right there on your list, so you can see exactly why it was removed instead of wondering where it went.
Does verification check more than whether the email is spelled correctly?
Yes. We test each address against its actual receiving mail server, at the mailbox level. A spelling check catches typos. A mailbox check catches addresses that stopped existing months or years ago.
When does verification happen?
It starts the moment your list finishes importing, not after you click send. By the time you're ready to launch, the reachable count on screen is already the real one.
What happens to an address that's removed?
It stays on your list, marked as removed, with a plain-language reason next to it. Nothing disappears silently, so your list count always adds up.
Does checking addresses cost extra on top of sending?
No separate purchase. Address checks draw from the same credit pool as sending and AI content, so there's one number to watch, not three.
Will this stop all my bounces?
It removes the addresses we can identify as dead or unreachable before you send, which is where most hard bounces come from. It catches the problem at the source instead of reporting it afterward.
Does a complaint on one of my past campaigns affect a future list?
Yes. Addresses that have complained anywhere on the platform, not just on your own past campaigns, never enter a new one.
Do I need to turn verification on?
No. It runs automatically on every list and every send, on Self-Serve and Done-For-You alike.
WORKS WITH
Part of the same system.
Verification doesn't work alone. It feeds the parts of the system that depend on a clean list.
Lists and imports
Bring your list from any spreadsheet. Verification starts the moment the import finishes.
See lists and importsSending domains, handled
Four sending domains come authenticated and hosted with every plan, so a clean list has somewhere safe to land.
See sending domainsPre-send review
A specialist read of every campaign before launch, on top of a list that's already been checked.
See pre-send reviewHonest reporting
Bounces, complaints and real human opens, reported separately, on a list that's already been through verification.
See reporting
Every piece. One system. Best odds in the game.
Send to a list that's actually there.
Every plan verifies every address before every send, Self-Serve or Done-For-You.
Get started