$ mxping blog list
Blog
Notes on email validation, DNS behavior, and developer-facing product design.
Apr 2026
Why regex is not email validation
MX records, disposable domains, role accounts, and the signals regex cannot see.
Sep 2026
Inside fast mode: what happens in 40 ms
How mxping keeps signup-time validation inside a practical latency budget without touching SMTP.
notes
More posts ship as the API surface settles.