Bulk Email List Cleaning & CSV Cleanser
Drop invalid syntax, dead domains, and disposable burners before campaign deployment. Keep your bounce rate under 1% and protect sender reputation across Klaviyo, SendGrid, and Mailchimp.
Contact List Cleanser
Scrub CSVs and Excel sheets with real-time verification and zero storage.
Authentication Required
Bulk contact list scrubbing and spreadsheet enrichment require an active EmailScore account. Please sign in or create a free account to scrub your contact lists.
Why Clean Bulk Email Lists Before Sending?
Sending to un-scrubbed contact lists degrades sender domain health and triggers automated ESP throttling.
Keep Bounce Rates Under 1%
Mailbox providers like Google and Yahoo reject emails from domains with bounce rates above 2%. EmailScore purges NXDOMAIN dead hosts and invalid mailboxes to safeguard your deliverability.
Recover Misspelled Leads
High-intent customers frequently misspell their email domains (@gamil.com, @outlok.com). EmailScore detects typos and suggests fixes so you don't lose sales leads.
Filter 50k+ Disposable Domains
Temporary 10-minute mailboxes and dormant spam traps silently damage domain reputation. Our real-time domain ledger isolates burner relays before you press send.
100% Stateless Processing — Zero Data Retention
We never store, share, or build shadow identity graphs from your uploaded contact files. Processing occurs in volatile RAM and all data is discarded immediately after download. Fully GDPR and CCPA compliant.
Frequently Asked Questions About List Cleaning
Why should I clean my bulk email list before sending marketing campaigns?
Email Service Providers (SendGrid, Klaviyo, Mailchimp) and destination mailbox providers (Google, Yahoo, Microsoft) enforce strict bounce thresholds. If your hard bounce rate exceeds 2%, your sender domain reputation suffers, routing your messages into spam or causing account suspension. EmailScore scrubs invalid syntax, dead NXDOMAINs, and spam traps to keep your bounce rate well below 1%.
Does EmailScore store or retain my uploaded CSV contact list?
Never. EmailScore operates under a strict 100% stateless architecture. Your uploaded spreadsheets and contact rows are processed in volatile memory and are never written to disk, logs, or persistent databases. Zero customer data is retained or shared.
How does domain typo auto-correction work?
Our syntax engine analyzes common keyboard slips and phonetic misspellings (such as @gamil.com, @outlok.com, or @yaho.com) against verified MX providers. The cleanser flags these addresses and provides immediate 'did you mean' suggestions to help recover high-value leads.
Can I automate bulk list cleaning via API?
Yes. In addition to the web CSV cleanser, developers can integrate our high-throughput POST /v1/bulk API endpoint. It processes bulk contact batches at over 3,200 evaluations per second with native gzip, brotli, and zstd stream compression.