CHECKED BEFORE IT'S SENT
Every address verified before you hit send.
Before any campaign leaves Senderoo, every address on your list is checked directly with its mail server — not spell-checked, actually knocked on. Dead mailboxes and dead domains never make it into a send, and you see your real, reachable number before you launch.
Checked with the mail server, not just spelling
Plain-language reason for every removal
Reachable count shown before you launch
Your list looks fine. Until you press send.
Every list collects dead weight. People change jobs, close old inboxes, mistype an address on a sign-up form two years ago. None of that shows up when you're staring at a spreadsheet — a dead address looks exactly like a good one until a real campaign goes near it.
Then you send, and a chunk of your list bounces hard. Hard bounces are the metric inbox providers watch closest, because they're the clearest sign a sender isn't paying attention to who's on their list. Enough of them and your next campaign — the one with real customers on it — lands in spam instead of the inbox.
The spelling checkers bundled into most list tools won't save you here. An address can be perfectly formed and still belong to a mailbox that's been closed for two years. The only way to know is to ask the mail server directly.
How the checking actually happens
Your list comes in
Import a spreadsheet or add a sign-up form, and verification starts straight away — while the rest of the list is still importing, not after.
Each address knocks on its mail server
Every address is checked directly with the receiving mail server, at the mailbox, not against a pattern of what an address should look like.
Dead ends get marked, not guessed at
Dead mailboxes, dead domains and any address that's complained anywhere on the platform are flagged with a plain-language reason and never enter a campaign.
You see the real number before you launch
The reachable count on your screen before you hit send is the actual number your campaign will attempt to reach — no surprises after the fact.
Removed addresses stay on the record
Nothing disappears quietly. Removed addresses stay on your list, marked as removed with the reason attached, so your numbers always add up.
What checking an address actually involves
AT THE MAILBOX, NOT ON THE PAGE
Checked with the mail server, not just spelling
A spelling check confirms an address has an @ sign and a dot in the right place. It can't tell you whether the mailbox behind it still exists. Senderoo contacts the receiving mail server directly and asks whether that specific mailbox is open to receive mail, the same way a real send would.
That's the difference between an address that looks correct and one that's actually reachable. Plenty of addresses pass a spelling check and still bounce the moment a real campaign reaches them — because the business closed, the domain lapsed, or the inbox was deleted years ago.
Verified at the mailbox, not the format
Checked against the live mail server
Runs the same test a real send would
NOTHING SLIPS THROUGH SILENTLY
A plain-language reason for every removal
When an address is taken out of a send, you're told why: mailbox doesn't exist, domain doesn't resolve, or a complaint registered somewhere on the platform. No vague "invalid" label standing in for an explanation you have to guess at.
That reason travels with the address. It isn't deleted from your list — it's marked as removed and kept, so six months from now you can still see exactly what happened and why your numbers look the way they do.
Reason shown for every removal
Removed addresses kept on record, not deleted
Complaints anywhere on the platform are remembered
THE NUMBER YOU SEE IS THE NUMBER YOU GET
Your reachable count, before you launch
Verification starts the moment your list finishes importing, not the moment you click send. By the time you're looking at a campaign ready to go, the reachable count on screen has already had time to check every address against its mail server.
That number is what you'll actually reach, not an estimate rounded up from how the list looked on the way in. You launch knowing, not hoping.
Verification starts during import, not after
Reachable count is the real figure, not an estimate
Checks draw from the same credit pool as sending
What a clean list actually does for you
Your sender reputation stays clean
Hard bounces are the signal inbox providers watch most closely. Removing dead addresses before you send keeps that signal clean, campaign after campaign.
Credits aren't wasted on dead ends
An address that bounces still costs a credit to attempt. Verification finds the dead ones first, so your sends go to people who can actually receive them.
Your list tells the truth
Removed addresses stay on your list marked with a reason, so the count you're looking at always matches what actually happened.
Nothing waits on you
Checking runs automatically while your list imports. You don't schedule it, trigger it or remember to run it.
No guessing before you launch
The reachable number on your screen before you hit send is the number your campaign will attempt to reach, not a rounded estimate.
Checking that actually stops bounces, not just measures them
A typical email platform
- Checks spelling and format only
- Invalid addresses vanish with no explanation
- Bounce reports arrive after you've already sent
- Verification is a separate step you have to remember
- Removed contacts disappear from your records
Senderoo
- Checks the mailbox itself, with the receiving mail server
- Plain-language reason kept against every removal
- Reachable count shown before you launch, not after
- Starts automatically while your list is still importing
- Removed addresses stay on your list, marked and dated
Questions about checking your list
Why did my list get smaller after I imported it?
Some addresses no longer have a working mailbox — the business closed, the domain lapsed, or the inbox was deleted. Each one is marked with the reason it was removed, and it stays on your list as a record, so your numbers always add up. It's not gone, it's just marked as unreachable.
Does checking addresses cost extra, on top of sending?
Checking draws from the same credit pool as sending and AI writing, so there's one number to watch rather than a separate bill for verification. You're not charged twice for the same contact.
Will this catch an address that's spelled correctly but doesn't exist?
Yes — that's exactly what it's built to catch. A spelling check only confirms the format looks right. Senderoo contacts the receiving mail server directly and asks whether that specific mailbox will accept mail, which is the only way to know if it's actually reachable.
How long does verification take?
It starts the moment your list finishes importing, running in the background rather than as a separate step you trigger. By the time you're ready to build and launch a campaign, the reachable count you see has already been checked.
What happens to an address that's marked as a complaint?
Once an address has complained anywhere on the platform, it's excluded from every future campaign, on any list it appears on. It stays visible on your records with the reason, but it never enters a send again.
Do I need to turn this on?
No. Every address on every list is checked before any campaign can send to it — it isn't an optional setting, and there's nothing to configure.
Is this the same as following Australia's spam rules?
It's related but separate. Verification confirms a mailbox is reachable; the Spam Act 2003 requires consent, clear sender identification and a working unsubscribe in every message. Both matter — one keeps your list clean, the other keeps you compliant.
Can I see which addresses were removed and why?
Yes. Removed addresses stay on your list marked as removed, with the plain-language reason attached, so you can review exactly what happened rather than wondering where a contact went.
Works alongside the rest of your list
Bring the list in first
Import any spreadsheet and verification starts the moment it lands, so you know who's safe to email straight away.
See lists and importsSend from a domain built for trust
Your sending domain is registered, authenticated and hosted for you, so a clean list lands somewhere reputable.
See sending domainsA second check before launch
Beyond address checking, every campaign gets a specialist read of its links, structure and sender details.
See pre-send reviewSent at a pace inboxes trust
A clean list still needs a steady pace. Each inbox provider gets a rate that matches how it's responding right now.
See deliverability
Stop guessing. Start knowing your list.
Every address checked before you send, month to month, priced in Australian dollars, cancel any time.
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