FAQ
Frequently asked questions
Common questions about EmailShield — answered.
How accurate is EmailShield verification?
EmailShield guarantees 99.8% verified accuracy across the standard inbox, business, and catch-all categories. Every address is processed through a four-stage pipeline before a result is returned.
Will verifying my list hurt my sender reputation?
No. EmailShield runs SMTP probes through a rotating pool of 1,200+ verification IPs that are isolated from any sending infrastructure. Your domain and sending IPs are never touched.
What's the difference between EmailShield and a single-stage verifier?
Most verifiers stop after a single SMTP handshake. EmailShield combines syntax/DNS checks, catch-all and disposable detection, careful SMTP probing, and historical inbox-rate scoring from a 1,200-domain network — producing a confidence score with explanations, not just a binary verdict.