ns.checkeremail.com is a mail server (MX) used by 1 checked domain. Based on public DNS, it is partially configured.
| IP address | Reverse DNS (PTR) | FCrDNS | DNSBL |
|---|---|---|---|
| 18.66.233.77 | server-18-66-233-77.waw51.r.cloudfront.net | Yes | Not listed |
| 18.66.233.59 | server-18-66-233-59.waw51.r.cloudfront.net | Yes | Not listed |
| 18.66.233.121 | server-18-66-233-121.waw51.r.cloudfront.net | Yes | Not listed |
| 18.66.233.89 | server-18-66-233-89.waw51.r.cloudfront.net | Yes | Not listed |
| 2600:9000:2435:2e00:19:d9c9:16c0:93a1 | No | Unknown | Not listed |
| 2600:9000:2435:4800:19:d9c9:16c0:93a1 | No | Unknown | Not listed |
| 2600:9000:2435:5600:19:d9c9:16c0:93a1 | No | Unknown | Not listed |
| 2600:9000:2435:8c00:19:d9c9:16c0:93a1 | No | Unknown | Not listed |
| 2600:9000:2435:6e00:19:d9c9:16c0:93a1 | No | Unknown | Not listed |
| 2600:9000:2435:6600:19:d9c9:16c0:93a1 | No | Unknown | Not listed |
| 2600:9000:2435:ba00:19:d9c9:16c0:93a1 | No | Unknown | Not listed |
| 2600:9000:2435:bc00:19:d9c9:16c0:93a1 | No | Unknown | Not listed |
FCrDNS (forward-confirmed reverse DNS) passes when the IP’s PTR name resolves back to the same IP. It is a key signal that a mail server is legitimately configured; servers without it are widely treated as suspicious.
These are public DNS facts about the mail server ns.checkeremail.com — the host that other servers connect to when delivering email for the domains above. We do not actively probe it over SMTP; the checks here are reverse DNS, forward-confirmed rDNS and public blocklists.
To look up a specific domain’s mail setup use the MX Lookup, or verify an address with the email checker. Learn more in email servers explained.
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