Question 1

How does HyperVerifier achieve 99.8% verification accuracy?

Accepted Answer

We utilize a multi-layer verification pipeline that executes RFC syntax audits, DNSSEC-backed MX lookups, disposable mailbox filtering across 180,000+ domains, and real-time SMTP socket handshakes directly with the receiving mail server without ever sending a message to the recipient.

Question 2

Will verifying emails alert the mailbox owner or send a message?

Accepted Answer

Never. Our engine performs low-level SMTP protocol negotiations, commands (HELO/EHLO, MAIL FROM, RCPT TO), analyzes the SMTP server response code, and gracefully terminates the session with QUIT before any email payload or data packet is sent.

Question 3

What is the speed of the Real-Time Verification API?

Accepted Answer

Our average API latency is under 38 milliseconds worldwide thanks to edge DNS caching, distributed connection pools, and high-concurrency Rust-based socket dispatchers.

Question 4

How does HyperVerifier handle Catch-All (Accept-All) domains?

Accepted Answer

Catch-all domains are configured by mail administrators to accept all inbound emails, even non-existent addresses. We run secondary algorithmic confidence scoring and heuristic domain reputation profiling to distinguish between genuine active inboxes and risky black holes.

Question 5

Can I white-label this platform for my agency or SaaS clients?

Accepted Answer

Yes! The entire marketing and customer portal architecture is built around our white-label theme engine. You can customize the brand name, custom domain, CNAME records, color palettes, email notifications, and pricing tiers effortlessly.

Question 6

How does HyperVerifier handle contact list confidentiality and security?

Accepted Answer

We do not store, sell, or rent uploaded contact lists. List data is encrypted at rest using AES-256 and automatically purged from our caching clusters within 14 days of processing.

Question 7

What file formats are supported for bulk validation?

Accepted Answer

We support CSV, TXT, XLS, and XLSX formats up to 10 million contacts per file, with automatic column detection for email addresses and custom metadata retention.

Question 8

Do unused verification credits expire?

Accepted Answer

No. Purchased pay-as-you-go credits never expire. Monthly subscription credits roll over for up to 90 days as long as your subscription remains active.

Email Deliverability Knowledge Base & FAQ

Ready to Stop Bounces and Maximize Cold Inbox Placement?

Email Deliverability Knowledge Base & FAQ

Ready to Stop Bounces and Maximize Cold Inbox Placement?