Verify your email lists and reach the inbox with confidence
Clean your list before you hit send. SpamCipher checks every address for validity, catches the ones that bounce, and flags risky contacts, so your campaigns reach real people and protect your sender reputation.
Start validating free
Find the bad addresses before they cost you
Bad email addresses quietly drain your results. They bounce, hurt your sender reputation, and skew your metrics. SpamCipher finds them before they cause any damage.
- Upload your list. Drop in a CSV or connect your email platform, and SpamCipher gets to work.
- We check every address. Each contact is verified against multiple signals in real time, with no test email ever sent.
- Download your clean results. Get a clear status for every address, ready to import back into your tools.
- Syntax and formatting: catches typos and malformed addresses
- Mailbox existence: confirms the inbox can actually receive mail
- Catch-all and risky domains: flags addresses that accept everything
- Disposable and role accounts: spots burner and info@ / sales@ addresses
- Spam traps and known complainers: keeps your list off blocklists
From messy to inbox-ready
Upload, validate, and download a clean list you can trust, in minutes.
Upload your list
Import a CSV or connect your email platform directly. SpamCipher handles lists of any size.
Run validation
We verify every address in real time and sort them into valid, invalid, and risky, with no test emails sent.
Download clean results
Export your verified list with a clear status on every contact, and import it straight back into your tools.
Stop bounces before they start
Run your first validations free, no credit card required.
Emailing a list you never validated?
It’s not too late. If you have been sending to a list you never verified, run it through SpamCipher now. You will see exactly which addresses are safe to keep, which to remove, and which to watch.
Your next campaign starts clean, your bounce rate drops, and the inbox providers that were starting to doubt you get a reason to trust you again.
Want to validate in real time? Use the API
Catch bad addresses at the moment of signup, before they ever reach your list. The SpamCipher API validates a single address in milliseconds.
Drop it into your signup forms, checkout, or CRM, with SDKs for popular languages and a few lines of code.
Real-time validation keeps your list clean from day one and stops bounces at the source.
Explore the APIHow to get the most from your validation results
Removing invalid addresses is only the start. The risky contacts, catch-all domains, role accounts, and low-confidence addresses, are where judgment matters. Suppress the clearly bad, segment the uncertain, and keep emailing the people who actually want to hear from you.
Make validation a habit, not a one-time cleanup. Verify new contacts at signup with the API, re-check dormant segments before a big send, and your sender reputation, deliverability, and ROI all move in the right direction.
