Clean your list before bad addresses cost you the inbox

Bounces, disposables and catch-alls quietly wreck your deliverability. Validate every address on your list, drop the ones that would bounce, and keep sending to inboxes that actually exist. Runs on Email Validation, from one request to millions a month.

https://phonevalidation.abstractapi.com/v1/
    ? api_key = YOUR_API_KEY
    & phone = 14154582468

{
    "phone": "14154582468",
    "valid": true
    "risk_score": 0.1,
    "registered_location": "San Francisco",
    "carrier": "Verizon USA",
    "line_type": "Mobile",
    "local_format": "4154582468",
    "international_format": "+14154582468",
"country_prefix" : "+1",
    "country_code": "US",
    "country_name":
"United Stated of America"‍
}

phone number validation api

{ "email": "info@tempmail.io", "deliverability": "UNDELIVERABLE", "is_valid_format": true, "is_disposable_email": true, "is_role_email": true, "is_catchall_email": false, "is_mx_found": true, "is_smtp_valid": false }

What Abstract removes from your list

Invalid, misformatted, and hard-bouncing addresses that spike your bounce rate.
Disposable and temporary domains, screened against millions of known throwaway providers.
Role-based addresses like info@ and support@ that rarely engage.
A quality score on every address, so you can set your own threshold for borderline contacts instead of guessing.
Risky catch-all domains, flagged so you can decide whether to keep or drop them.
Trusted for email list cleaning by teams at
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4.8 from 1,863 votes
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How cleaning works with Abstract

Check every address in real time and get structured signals back in under 300ms.
Export your list
Pull your list from your ESP or CRM as a CSV, or send addresses straight from the API.
Validate every address
Run each through Abstract for a deliverability status plus disposable, role, and catch-all flags.
Drop, keep, or re-permission
Remove undeliverable and risky addresses, keep the valid ones, and re-confirm borderline ones.
Dedupe and segment
Remove duplicates and segment by engagement so you only send to people who want it.
Keep it clean at signup
Validate new addresses in real time at the form so the list never gets dirty again.
Real time, not static
Every signal is checked when you validate the address, not read from a stale snapshot.
Clean your list through the API
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4.8 from 1,863 votes
Validate every address for bounces, disposables, and catch-alls in one request.
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No credit card required

Why teams clean their lists with Abstract

Catch invalid and bouncing addresses
Check format, MX records, and SMTP so addresses that would hard bounce never reach your sender.
Spot catch-all and risky domains
Detect catch-all domains and low-quality addresses that quietly inflate your bounce rate.
Flag disposable and role addresses
Screen against millions of disposable domains and catch role accounts like info@ and support@.
Fix typos, keep real subscribers
Typo suggestions recover misspelled addresses like gmial.com instead of dropping a real contact.
For more information check our

The best build
on Abstract

Spammy signs up were an issue for us for a while, and we struggled to come up with the best way to identify all the variations in bad emails we were getting. Thankfully we found and quickly integrated with Abstract's email validation API, which saved us a bunch of time and gave us peace of mind.
Chris Stanley, Scope

Frequently asked questions

How much does list cleaning cost?

Email Validation starts free with 100 requests a month and no credit card. Paid plans scale with the requests you send, so a one-time bulk pass and ongoing signup validation are priced the same way, per request.

What volume can it handle?

From one request to millions a month. Self-serve plans reach 6,000,000 requests a year, and higher volumes move to a custom plan.

How do I integrate it?

Send one request per address to the Email Validation endpoint and read the JSON response. No SDK is required, and the same call works from your signup form, your CRM, or a script running over an exported file.

Is the data handled compliantly?

Abstract is SOC 2 compliant and GDPR ready. You send the address, you get the result, and you stay in control of what you store on your side.

Does list cleaning improve deliverability?

Yes, indirectly. Bounces and spam-trap hits are what damage sender reputation, and reputation is what mailbox providers use to decide inbox versus spam. Removing the addresses that cause those hits protects your reputation, which in turn protects deliverability. It cannot fix bad content or poor engagement on its own.

What is the difference between list cleaning and email verification?

Email verification checks a single address, usually at the point of entry like a signup form. List cleaning applies that same verification across an entire existing list in bulk. Verification keeps new addresses clean going in; cleaning fixes the list you already have.

Can you clean an email list in bulk?

Yes. You can clean a list in bulk by running each address through Abstract's Email Validation API and keeping only the ones that pass. Many teams do a one-time bulk pass on their existing list, then validate at signup so it never gets dirty again.

Start cleaning your list for free
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4.8 from 1,863 votes
Free to start. No credit card required.
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