Every bounced email hurts your sender reputation. BounceShift validates addresses before you hit send—catching invalid, disposable, and spam traps that tank your deliverability.
No credit card Setup in 2 minutes Credits never expire
{
"email": "[email protected]",
"status": "valid",
"confidence": 98,
"mx_found": true,
"smtp_valid": true,
"is_disposable": false,
"is_catch_all": false,
"is_role_account": false
}Trusted by email marketers and developers
If you've ever experienced these problems, you know the pain:
Every hard bounce signals to ESPs that you're not maintaining your list. Above 2% and you're in trouble.
Once your sender score drops, even legitimate emails end up in spam. Recovery takes months.
You're paying to send emails that never arrive. Cleaning your list before sending saves real money.
We don't just check if an email looks valid. We verify it actually exists and is safe to send to.
We check DNS records to confirm the domain can receive email at all.
Direct mailbox verification confirms the specific address exists and accepts mail.
Catch temporary email addresses from 10MinuteMail, Guerrilla Mail, and 3,000+ others.
Identify known spam traps and abuse addresses that destroy sender reputation.
Identify domains that accept all emails—high risk for invalid addresses.
Flag generic addresses like info@, support@, and sales@ that rarely engage.
Whether you need real-time API validation, bulk list cleaning, or automatic ESP monitoring—we've got you covered.
Validate emails at the point of capture. Add a single API call to your signup forms and catch bad emails before they enter your database.
Upload your entire email list as a CSV. We'll process it in the background and notify you when results are ready to download.
Connect your ESP (Mailgun, SendGrid, Postmark, SES) to automatically track bounces and complaints. Data is stored as hashes only—we can't read the original emails.
Pay only for what you use. 1 credit = 1 email validation. No monthly minimums.
Volume discounts available for 100K+ validations
Built by developers, for developers. RESTful API with comprehensive documentation, clear response codes, and SDKs for popular languages.
curl -X POST \
'https://api.bounceshift.com/v1/validate/single' \
-H 'Authorization: Bearer YOUR_API_KEY' \
-H 'Content-Type: application/json' \
-d '{"email": "[email protected]"}'"Our bounce rate dropped from 4.2% to 0.3% after integrating BounceShift into our signup flow. The API is fast and the documentation is excellent."
James Miller
Head of Growth, TechStartup
"We cleaned 50K emails before our product launch and found 12% were invalid. BounceShift saved us from destroying our sender reputation on day one."
Sarah Kim
Marketing Director, SaaSCo
"The ESP webhook integration is a game changer. Bounces and complaints automatically flag addresses so we never send to them again. Set it once, forget it."
David Park
CTO, EmailAgency
We use multi-layer verification including DNS checks, SMTP verification, and pattern analysis. For most emails, accuracy exceeds 98%. Catch-all domains are flagged separately since they accept any address.
No. Emails you validate are processed and cached briefly (24 hours), then deleted. For our reputation database (webhook data), we store only one-way cryptographic hashes—not the actual email addresses. We literally cannot read, export, or sell your data because we don't have it.
No. Credits never expire. Buy what you need, use them when you need them.
Single email validation typically completes in 200-500ms. Batch processing runs in parallel—a list of 100K emails processes in minutes.
We support Mailgun, SendGrid, Postmark, and Amazon SES. Connect your ESP once, and we'll automatically track bounces and complaints. All email addresses are immediately hashed—we store only the hash, never the original address. We can't read or export your data.
Yes. Every new account gets 100 free credits to test the service. No credit card required.
Every email you send to an invalid address damages your reputation.
Clean your list today.
No credit card required. Takes less than 2 minutes to start.