Email verification that runs before every bulk send
SalesScope’s email verification checks every address on your list — syntax, typos, disposable domains, mail servers and your own bounce history — and won’t enroll anyone in a sequence until their address has been checked.
- Checks before every bulk send
- Catches gmial.com-style typos
- Runs in the background, at scale
An email validation tool that checks the address and its domain
Each address goes through the cheapest certain checks first and the history checks last. Nobody has to press a button for it to happen.
Syntax and signup rules
Malformed addresses, and names a provider could never have issued — a Gmail address with fewer than six characters before the @, for example.
Typos of big providers
Domains one keystroke from a major provider, like gmial.com or hotmial.com, are refused with the likely fix suggested.
Disposable and role addresses
Throwaway domains are refused. Shared inboxes such as info@ and sales@ are flagged as risky but still allowed.
Mail servers
A domain with no mail server or a null MX is refused. One whose mail servers resolve to nothing, or that has only a website address, is held.
Your own history
Addresses that bounced, unsubscribed or complained in your workspace are refused; domains where a third of your mail has bounced are held.
Checked in the background
Imports and edits are checked on the server whether or not anyone has the page open, with a fair share for every workspace.
Verify your email list before sending, automatically
Checking starts the moment contacts arrive: an import, a paste or an edited cell puts the address in line. When you add contacts to a sequence, the checked ones join at once and the rest wait at the front of the line, joining the moment their check clears.
- Nobody unchecked is ever enrolled in a sequence
- One press validates a waiting set straight away
- Progress shows as the checks run
- Domains that don’t answer are retried, not guessed
Every bounce makes the next check sharper
A bounce suppresses that address across your workspace, so the same dead mailbox never costs a second send. When a bounce says the whole domain is gone, or a third of your mail to a domain has bounced, the domain’s other addresses are held out of bulk sends.
- Held addresses can still be emailed by hand, or released for sequences
- A later check that finds the domain healthy releases them
- Sequences paused by the bounce breaker stay paused until the rest of their audience is validated
- An admin can allow a suppressed address again, with a note
outreach@ridgelinelabs.io bounced 6.2% of what it sent this week — over your 5% limit. The mailbox is on hold for 48 hours and its sequences are paused. Nothing was cancelled: 312 emails wait exactly where they stopped.
Resume unlocks once everything still waiting has been validated.
What email verification can and can’t tell you
What SalesScope checks
- The address is well formed and could have been issued
- The domain isn’t a typo, a throwaway or a dead end
- The domain has a working mail route
- The address isn’t on your suppression list
What it doesn’t do
- It doesn’t probe mailboxes over SMTP
- It can’t promise that a particular inbox exists
- It can’t see a person who left a healthy company
- So every bounce feeds straight back into the next check
How SalesScope checks an address
Shape and rules
The address is parsed, checked against the provider’s signup rules, and compared with major providers for typos and with known throwaway domains.
DNS
SalesScope asks public DNS resolvers for the domain’s mail servers. A healthy answer is reused for a week across every workspace; a problem is asked about again within a day or two.
History
The address is compared with your suppression list, and its domain with your workspace’s bounce history.
Verdict
Each address ends up deliverable, risky, held or invalid. Only deliverable and risky addresses are mailed in bulk.
What email verification is, and why cold email needs it
Email verification — also called email validation — checks that an address can receive mail before you send to it. For cold email it does two jobs: it keeps your bounce rate down, and with it your sending domain’s reputation, because a list full of dead addresses is one of the plainest signs that a sender didn’t check its list.
What a check looks at
- Syntax. Is it shaped like an email address at all?
- Provider rules. As of October 2026, Gmail’s own help asks for a username 6–30 characters long, so
abc@gmail.comcan’t be a real Gmail address. - Typos.
jane@gmial.comis the classic fixable bounce, and typo domains often publish mail servers to catch misdirected mail, so a DNS check alone lets them through. - Disposable and role addresses. Throwaway domains never reach a buyer; shared inboxes like
info@deliver but rarely reply. - DNS. Does the domain publish mail servers (MX records)? Does it publish a null MX (RFC 7505) saying it accepts no mail at all? Do its mail servers resolve?
- History. Has this address bounced, unsubscribed or complained before?
The part nobody can check from outside
Some verification services also connect to the recipient’s mail server and ask whether the mailbox exists. SalesScope doesn’t: it checks the address and its domain, not the mailbox. That means it can’t catch someone who left a company whose domain and mail servers are perfectly healthy, which is a common source of bounces. What keeps the rate down from there is feedback: a bounce suppresses the address across your workspace, and a domain whose mail keeps failing holds its other addresses.
When to verify
Verify every list before its first send, and again before mailing addresses that have sat for months, because people change jobs and domains lapse. In SalesScope you don’t have to remember: imports are checked in the background, nobody unchecked can be enrolled in a sequence, and when the bounce breaker puts a mailbox on hold, its sequences stay paused until the rest of their audience has been checked again and someone resumes them. The email list verification guide covers how to clean a list before you import it, and the spreadsheet CRM shows each contact’s verdict beside the address.
Frequently asked questions
Does SalesScope verify that a mailbox exists?
No. SalesScope checks the address and its domain — syntax, provider rules, typos, disposable domains, mail servers and your own history — but it doesn’t connect to the recipient’s mail server to ask about the mailbox. It can’t promise that a particular inbox exists, so bounces feed back instead: one bounce suppresses that address across your workspace.
Will a sequence send to an address that hasn’t been checked?
No. Nobody unchecked is ever enrolled. When you add contacts, those already checked join at once and the rest join as soon as their check clears; one press of Validate checks a waiting set straight away. If no DNS service answers for a domain, you can choose to add those contacts without a DNS check, and they are marked unverified.
What happens to role addresses like info@ or sales@?
They are flagged as risky but still allowed, because shared inboxes do receive mail; they just tend to reply less. Disposable addresses, typos of major providers, domains with no mail server and addresses on your suppression list are refused.
What does a “held” address mean?
A held address sits on a domain that bounces far more than usual: it has no MX record and only a website address, its mail servers don’t resolve, a third of your mail there has bounced, or a bounce said the domain can’t take mail at all. Sequences and bulk sends skip held addresses and say why, but you can still email one by hand, and a later check that finds the domain healthy releases it.
How many addresses can it check?
It works through tens of thousands of addresses in the background, taking a fair share for each workspace in turn so one big import doesn’t hold up anyone else. Progress shows as it goes, and nobody needs to keep the page open.
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