Learn About Email Validation
Guides, tutorials, and best practices to help you get the most out of your email validation workflow.
The Ultimate Guide to Catch-All Emails
Everything you need to know about catch-all domains: what they are, why standard tools fail to validate them, and how Scrubby's proprietary technology delivers the answers other tools can't. Includes real-world case studies and actionable strategies.
Guides, Tutorials & More
Dive deep into email validation best practices with our curated collection of resources.
How to Validate Risky Emails
Learn the step-by-step process for validating catch-all and risky emails that standard tools mark as unknown.
Understanding Catch-All Domains
What catch-all domains are, why they matter for your email campaigns, and how to handle them effectively.
Email Deliverability Best Practices
Proven strategies to improve your email deliverability rates and protect your sender reputation across all major ISPs.
Integrating Scrubby with Your Stack
Step-by-step tutorials for connecting Scrubby with Clay, HubSpot, Instantly, SmartLead, Zapier, and more.
How to Verify Catch-All Emails
What to actually do with the addresses ZeroBounce and similar tools hand back as "unknown", and how to resolve them.
Scrubby API Documentation
Complete API reference with authentication, endpoints, webhooks, and code examples in multiple languages.
Email Verification vs Validation
Understand the critical difference between email verification and validation, and why you need both for optimal results.
Latest from the Blog
Stay updated with the latest insights on email validation, deliverability, and lead generation.
Inbox Placement Testing: How to Build a Seed List That Tells You Where Your Email Actually Lands
Your ESP reports 99% delivered, which only means nothing bounced. It says nothing about whether anyone saw the message. A seed list is the only way to watch your own mail arrive and see which folder it lands in. Here is how to build one that does not lie to you.
Nick Abraham · Oct 11, 2026 
How to Read DMARC Aggregate Reports: Turning RUA XML Into Real Deliverability Fixes
Publishing a DMARC record is the easy part. The reports that come back are compressed XML that nobody reads, which is why so many senders sit at p=none for years. Here is how to decode a RUA report element by element, tell a real spoofer from a mailing list, and know which failures you can safely ignore.
Nick Abraham · Oct 9, 2026 
Reverse DNS and PTR Records: The Email Authentication Check Most Senders Never Configure
SPF, DKIM, and DMARC live in your DNS zone, so you can fix them yourself. A PTR record does not, which is why so many senders have one that is missing, generic, or pointing at the wrong hostname. Here is how reverse DNS is actually checked, who controls it, and how to set it correctly on every major sending platform.
Amit S. · Oct 8, 2026 
Microsoft SNDS Setup Guide: How to Monitor Your Outlook and Microsoft 365 Sender Reputation
Google Postmaster Tools tells you how Gmail sees you. It tells you nothing about Outlook, Hotmail, or Microsoft 365, which is where most of your B2B pipeline actually lives. Here is how to get into Smart Network Data Services, read what it reports, and fix the list quality problems it exposes.
Kristel K. · Oct 7, 2026 
How to Clean Your Iterable User List and Reduce Bounce Rate Before Your Next Journey Send
Iterable pulls user profiles in from Segment, reverse ETL, product events, and CSV imports, which means bad addresses arrive from five directions at once. Here is the workflow to clean your Iterable user list, resolve the catch-all B2B addresses standard verifiers refuse to answer, and protect your sending reputation before the next journey fires.
Amit S. · Oct 6, 2026 
How to Clean Your Customer.io Audience and Cut Your Bounce Rate Before the Next Broadcast
Customer.io bills you per profile and suppresses hard bounces automatically, so every invalid address in your workspace costs money twice. Here is the workflow to clean your Customer.io people, resolve the catch-all B2B addresses standard verifiers skip, and protect deliverability before your next broadcast.
Abhinav · Oct 5, 2026 Stay Updated
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