custmx.cscdns.net handles mail for 134 domain(s) we track — a mix of disposable and ordinary domains.
This host carries a mix of ordinary and throwaway domains. A domain being here is a signal, not a verdict — check the individual domain before acting on it.
See whether a specific domain is disposable, forwarding or safe — and which mail server it actually uses.
Enter a domain to look up its mail server and trust signals
Checking syntax, MX, SMTP, trust, gateway, and domain profile…
Enter a domain above and click Check to see results.
A mail server's reputation is one signal. The API scores every signup against the whole catalogue — disposable pools, low-trust domains, catch-alls and gateways — as it grows.
What you unlock