Stop Discarding Your Most Valuable Leads
Up to 42% of your email list is marked risky by standard tools. Scrubby validates these addresses with real delivery tests and recovers leads that would otherwise be lost.
The emails others cannot verify
Risky emails are addresses that standard verification tools cannot definitively classify as valid or invalid. Here are the most common types.
Catch-All Domains
Domains configured to accept any email address, whether or not a specific mailbox exists. Standard SMTP checks return a positive result for every address, making it impossible to distinguish valid from invalid.
Accept-All Addresses
Similar to catch-all, these servers accept all incoming emails without rejection. They produce false positives during verification, leaving you with unresolved data.
Unknown Status Emails
Addresses that verification tools cannot conclusively classify. The server may be temporarily unavailable, rate-limited, or using anti-verification measures.
Low-Confidence Results
Emails returned with a low confidence score by verification providers. These fall into a gray area where the tool suspects validity but cannot confirm it.
Why standard tools fall short
Traditional email verification relies on SMTP handshakes, which fundamentally cannot resolve catch-all domains.
SMTP Handshake Limitation
Standard tools connect to the mail server and ask if an address exists. Catch-all servers always say yes, regardless of whether the mailbox is real.
No Actual Delivery Test
Traditional verification never sends a real email. It relies on server responses that can be misleading, especially with catch-all and greylisting configurations.
Result: Unresolved Data
The tool marks these addresses as risky, unknown, or unverifiable. You are left to guess whether to include or exclude them from your campaigns.
Real delivery tests, real results
Unlike SMTP-based tools, Scrubby sends actual blank test emails to determine if a mailbox truly exists and accepts delivery.
Import Risky Emails
Upload the risky segment from your existing verification tool via CSV or connect through our API. Only the risky emails need processing.
Blank Email Testing
Scrubby sends carefully crafted blank test emails to each address. This is the only way to definitively determine if a catch-all mailbox actually exists and accepts delivery.
Bounce Analysis
We monitor server responses and bounce-back patterns over 2-3 days. Hard bounces indicate invalid addresses. Successful deliveries confirm the mailbox is real and active.
Definitive Results
Each email receives a clear valid or invalid classification. No more risky, no more unknown. Just actionable data you can confidently use in your campaigns.
Numbers that matter
Thousands of teams trust Scrubby to validate their risky emails and recover leads other tools leave behind.
Accuracy Rate
Risky Emails Recovered
Post-Validation Bounce Rate
Complement your existing stack
Scrubby integrates with the verification tools you already use. Export your risky segment and let Scrubby handle the rest.
Recover Your Risky Leads
Start with 100 free credits. Upload your risky emails and see how many valid, deliverable addresses Scrubby can recover.