Why 30% of B2B Email Verification Fails: The Catch-All Domain Problem Explained

Three months ago I ran a cold outbound campaign to 4,200 "verified" leads. The list had been processed by a well-known verifier—overall accuracy rate: 97%. My bounce rate on the first send was 11.4%. The domain I was using had been sending cleanly for two years. It took six weeks of re-warmup to recover it. The culprit: catch-all domains. Nobody told me they were a separate category with completely different verification mechanics. What a catch-all domain actually is When your email server check