Home / Blog
Blog
How SMTP RCPT validation works (without sending a test email)
The plain-English version of the technique every email-verification API uses under the hood — and the four edge cases that trip up naive implementations.
June 29, 2026 · 8 min read
The disposable email problem in 2026: 652 providers, one growing list
How many disposable services exist, why the list keeps growing, what receiving infrastructure looks like, and which providers most often slip past consumer-grade filters.
June 29, 2026 · 10 min read
Mailcheq vs Zerobounce vs NeverBounce: an honest 2026 comparison
We charge less. We are also smaller. Here is what that actually means for accuracy, latency, and the cost of a 50,000-address verification run.
June 29, 2026 · 12 min read