Frequently Asked Questions
Everything you need to know about Scrubby, email validation, and how to get the most out of your risky email lists.
General
3What is a risky or catch-all email?
Risky emails may cause deliverability issues. Catch-all addresses receive all messages sent to a domain, even nonexistent ones. They can also include temporary, invalid, spam-trap, or role-based addresses.
Is a Catch-All email the same thing as a Risky Email?
Yes, SMTP tools classify them as Catch-All or Accept-All, while data providers classify them as Risky or assign low confidence validation scores.
Why can't my SMTP tool validate the Risky Emails?
Catch-All servers deliberately bypass SMTP validation. They catch all "handshakes" without providing Valid or Invalid signals.
Results & Accuracy
3What Kind of Results Can I Expect with Scrubby?
Expect approximately 98% accuracy detecting hard bounces, maintaining bounce rates under 2%. Soft bounces depend on list quality, sender score, domain reputation, and content.
What is a soft bounce vs a hard bounce? Can Scrubby catch soft bounces?
Hard bounces occur for nonexistent addresses. Soft bounces result from offline servers or poor sender reputation. Scrubby focuses on hard bounces and cannot catch soft bounces.
What happens if I don't validate my "risky" emails?
Discarding risky emails wastes up to 42% of your list. Including unvalidated ones risks burned domains and account shutdowns from high bounce rates.
Usage & Integration
5How can I best utilize Scrubby?
Use Scrubby exclusively for "risky" emails that SMTP tools classify as Catch-All or Accept-All, or data providers mark as Risky with low confidence scores.
What are the most common SMTP verification tools?
Common tools include ZeroBounce, NeverBounce, BriteVerify, DeBounce, and MillionVerifier.
How does Scrubby work with my existing tech stack?
Scrubby complements existing tools by validating "risky" emails that traditional platforms can't confidently classify through actual blank email testing.
Can I use my own accounts with ZeroBounce, NeverBounce, or MillionVerifier?
Yes, you can enter API keys from these services. In-house accounts remain available if you don't have external accounts.
Does Scrubby integrate with Clay?
Yes, full integration is available with documentation and setup guides.
Account & Billing
4Is there a Scrubby API available?
Yes, API keys are available within the platform with full documentation.
What if I need more credits?
Purchase additional data packs once you exceed your monthly quota limits.
If I cancel my subscription, do I keep my rolled-over credits?
Yes, unused credits remain available after canceling monthly subscriptions.
I'm trying to register but it says "Domain Restricted". What should I do?
Registration restrictions apply to personal/public domain emails (Gmail, Yahoo), nonexistent domains, or domains redirecting elsewhere. Use a business email.
Security
2How secure is my data with Scrubby?
Data is encrypted with cutting-edge protocols and remains under your control at all times.
My question isn't answered. How do I contact you?
Email support@scrubby.io. Expect responses within 24–48 hours; mention urgency for priority handling.
Still have questions?
Can't find the answer you're looking for? Our support team is here to help. Reach out and we'll get back to you within 24–48 hours.