VERIFICATION
Every address, checked at the mailbox.
Before any campaign reaches your list, every single address is verified with its own mail server. Dead mailboxes, dead domains and anyone who's complained elsewhere never get the chance to bounce.
Checked at the mail server, not just the spelling
A plain-language reason for every removal
Your real reachable count before you launch
THE PROBLEM
Your list looks fine. Until you press send.
Every list rots a little every year. People change jobs, close old inboxes, abandon domains, or decide your last campaign wasn't for them and mark it as spam without ever touching unsubscribe. None of that shows up when you're just looking at a spreadsheet of names and addresses. They all look exactly as valid as the day you collected them.
Then you press send, and the truth arrives as hard bounces: mail servers that refuse the message outright because the mailbox doesn't exist anymore, or never did. Inbox providers notice. A hard bounce isn't a shrug, it's a signal that you don't know your own list, and that signal follows your sending domain into every inbox decision that comes after it.
The fix isn't guessing which addresses look risky, or waiting for a bounce report to tell you after the damage is done. It's checking every address with the mail server before the send button ever lights up, so the only people hearing from you are the people who can actually hear you.
FROM IMPORT TO INBOX
How every address gets its mailbox checked
No separate tool, no extra step to remember. Verification rides along with the list you already uploaded.
Your list comes in
Import a spreadsheet or sync a form, and verification starts right away, while the import is still running.
Every mailbox gets checked
Each address is verified directly with its receiving mail server, confirming the mailbox is real, not just well formatted.
Dead ends get removed
Dead mailboxes, dead domains and addresses that have complained anywhere on the platform are pulled out before a campaign ever sees them.
You see the real number
Before you launch, your reachable count is the real one, not an estimate you're hoping is close.
IN DETAIL
Three ways verification earns its keep
Checking an address is more than a glance at its spelling. Here's exactly what happens before your list is cleared to send.
AT THE MAILBOX
Checked with the mail server, not the spellchecker
A spelling check tells you an address is shaped right. It can't tell you whether anyone's home. We go further: every address is verified directly with the domain's receiving mail server, the same conversation a real send has, before any campaign gets near it.
That's the difference between 'looks correct' and 'will actually accept your mail'. An address can be perfectly formatted and still belong to a mailbox closed two years ago, exactly the kind that slips past a format check and straight into your bounce report.
Verified at the real mail server, mailbox by mailbox
Goes further than a format or syntax check
Catches dead mailboxes format checks miss
NOTHING DISAPPEARS
A plain-language reason, every single time
An address never just vanishes from your list. When one is removed, it stays, marked as removed, with the exact reason sitting right next to it: mailbox not found, domain expired, complained on another campaign. No mystery, no math that stops adding up.
That record matters later too. If a customer asks why they stopped hearing from you, or you're reviewing list health before a big send, the answer is already written down, in plain English, not a bounce code you have to go look up.
Removed addresses stay on the list, marked
Every reason spelled out in plain English
Your list total always explains itself
NO SURPRISES AT SEND
Your reachable count, before you launch
Verification doesn't wait for a separate clean-up step. It starts the moment your list is importing, so the checking is already done, or well under way, by the time you're building the campaign around it.
That means the number on your launch screen isn't a guess rounded up for comfort. It's the count of addresses that passed a real mailbox check, and it draws from the same credit pool as sending, so there's still just one number to keep an eye on.
Starts while your list is still importing
No separate clean-up step to remember
Shares one credit pool with sending
WHAT IT MEANS FOR YOU
Fewer bounces, a reputation worth keeping
Checking addresses is quiet work. Here's what it buys you on the inbox provider's side of the conversation.
Bounces prevented, not just measured
A bounce report after the fact tells you what already went wrong. This stops it before it starts: addresses that would bounce never make it into the send list, so there's nothing left to measure.
Checked at the mailbox, not the spelling
Every address gets a real conversation with its mail server, so a perfectly spelled dead address never gets mistaken for a live one.
A reason for every removal
Nothing is deleted quietly. Each removed address keeps its plain-language reason, right there on your list.
Your reachable count, before you launch
Verification runs while your list imports, so the number you see on launch day is the real one, not an estimate.
One credit pool, no surprises
Checking an address and sending to one draw from the same pool, so you're watching a single number, not two.
COMPARED
What a typical platform misses
Most platforms check an address once, at signup, and trust it forever after. We check it again, against the mail server, right before it matters.
A typical email platform
- Checks spelling and format only
- Bounces show up after you've sent
- A cryptic bounce code to decode
- List count drops with no explanation
- Guess your reachable count on launch day
- A separate tool, a separate bill
Kadexin
- Verified at the mailbox. Confirmed with the real receiving mail server, not just syntax.
- Removed before you send. Dead mailboxes and dead domains never enter the campaign.
- Plain-language reason, logged right on the contact's record.
- Nothing disappears. Removed addresses stay, marked, so your numbers add up.
- See it before you launch. The real number, every time.
- Same credit pool. Checks and sends share one number to watch.
QUESTIONS
Email verification, answered
Why did my list get smaller?
Some addresses no longer have a working mailbox. Each one is marked with the reason, and stays on your list as a record, so you can see exactly why.
Does checking addresses cost extra?
No separate charge and no separate tool. Checks use credits from the same pool as sending, so there's one number to watch, not two.
Will verification slow down my send?
Verification starts while your list is still importing. By the time you're ready to launch, the reachable count you see is already the real one.
What counts as a dead address?
A mailbox that no longer exists, a domain that no longer resolves, or an address that has complained on any campaign across the platform. None of these enter a send.
Do removed addresses just vanish from my list?
No. They stay on your list marked as removed, each with its plain-language reason, so your totals always add up and you can look back and see why.
Is this just a spelling check with extra steps?
No. Each address is verified with its receiving mail server at the mailbox, confirming it actually exists, not just that it's formatted correctly.
What about opt-outs and the law?
Verification confirms a mailbox exists, it doesn't replace honoring opt-outs. Under the CAN-SPAM Act you still need honest headers, a physical address, and opt-out requests honored within 10 business days, which applies across every send you make.
WORKS WITH
Pairs well with the rest of your send
Verification is one piece. Here's what it hands off to, and what's handing off to it.
Lists and imports
Bring your list in from any spreadsheet, and know exactly who's safe to send to.
See lists and importsPre-send review
A specialist read of every campaign before it goes out, while mistakes are still free to fix.
See pre-send reviewDeliverability
A natural sending pace, spread across your domains, so your campaigns land in the inbox.
See deliverabilityOne simple credit pool
One credit sends one email. Address checks and AI writing use the same pool.
See the credit pool
Send to the people who can actually hear you
Every address checked, every domain handled, month to month, no contracts.
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