checkeremail.com is a mail server (MX) used by 1 checked domain. Based on public DNS, it looks healthy.
| IP address | Reverse DNS (PTR) | FCrDNS | DNSBL |
|---|---|---|---|
| 52.101.9.87 | mail-bl2pr02cu00507.inbound.protection.outlook.com | Yes | Not listed |
| 52.101.40.0 | mail-cy3pr04cu00100.inbound.protection.outlook.com | Yes | Not listed |
| 52.101.10.5 | mail-bn6pr04cu00105.inbound.protection.outlook.com | Yes | Not listed |
| 52.101.60.154 | mail-bn0pr03cu00302.inbound.protection.outlook.com | Yes | Not listed |
| 2a01:111:f403:c902::14 | mail-byapr04cu00204.inbound.protection.outlook.com | Yes | Not listed |
| 2a01:111:f403:c902:: | mail-sj2pr05cu00300.inbound.protection.outlook.com | Yes | Not listed |
| 2a01:111:f403:c803:: | mail-bn1pr21cu00200.inbound.protection.outlook.com | Yes | Not listed |
| 2a01:111:f403:f913::2 | mail-cy4pr03cu00102.inbound.protection.outlook.com | Yes | 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 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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