Free tool · no signup
Will this email bounce?
Paste up to 25 addresses. Each one is checked for format, typo’d domains like gmial.com, disposable providers, role accounts and a working mail server, and you get back the list that is safe to send to.
Paste a list. Each address is checked for format, typos, disposable providers, role accounts and a working mail server, in your browser.
- 1.Paste addresses, one per line or separated by commas.
- 2.Read each verdict: domain accepts mail, risky, or will bounce.
- 3.Copy the addresses that passed and leave the rest out of your campaign.
Why a bounce costs more than one lost email
Mailbox providers read your bounce rate as a statement about how you built your list. A few percent of hard bounces is enough to push the rest of a campaign toward spam, including the messages to perfectly good addresses. Checking before you send is the cheapest deliverability work there is.
The most common causes are simple: a typo in the domain, an address at a domain that no longer receives mail, and throwaway addresses from disposable providers that stop working within hours.
What this checker can and cannot tell you
It can tell you with certainty when an address cannot receive mail: bad format, a misspelled provider, a disposable domain or a domain with no mail server. It cannot confirm that a specific mailbox exists, because that needs a conversation with the receiving server that a browser cannot have. Leads Ranger runs that deeper check on every lead inside the app, and again right before sending.
Do this automatically
Leads Ranger verifies every lead the moment it is found and again right before sending, so a bad address never reaches your mailbox.
Straight answers
Questions, answered.
Check the format, look for a misspelled domain, make sure the domain is not a disposable provider, and confirm the domain publishes an MX record (a mail server). This tool does all four. Confirming the mailbox itself needs a server-to-server check, which email verification services and Leads Ranger perform.
An address for a function rather than a person: info@, sales@, support@. They are valid and often read, but they are shared inboxes that filter aggressively, so a named person’s address usually gets better results for cold outreach.
No. The checks run in your browser; only the domain names are looked up in public DNS. Nothing is sent to Leads Ranger.
Go deeper
Guides from the Ranger Playbook
Guide · 7 min read
Email Bounce Rates: What Is Normal, What Is Dangerous, and How to Fix Yours
The difference between hard and soft bounces, the thresholds that trigger filtering, why bounce rate is the fastest way to damage a domain, and how to get yours under control.
Read the guide→Guide · 8 min readEmail Verification Tools: What They Can and Cannot Tell You
The three checks every verification tool runs, why catch-all domains are unprovable, what accuracy claims actually mean, and whether you need a standalone tool at all.
Read the guide→Guide · 8 min readHow to Find Business Email Addresses: 7 Methods That Still Work
Seven reliable ways to find a business email address, ranked by accuracy, plus how to verify what you find and why guessing patterns is more dangerous than it looks.
Read the guide→Free during the open pilot
Now find someone to send it to.
Leads Ranger finds local businesses with real emails, warms your mailboxes and runs the outreach. No credit card.
No credit card required
Free during the open pilot