checkeremail.com

checkeremail.com is a mail server (MX) used by 1 checked domain. Based on public DNS, it looks healthy.

IP & reverse DNS

IP address	Reverse DNS (PTR)	FCrDNS	DNSBL
52.101.41.122	mail-byapr02cu00302.inbound.protection.outlook.com	Yes	Not listed
52.101.9.11	mail-bl1pr02cu00103.inbound.protection.outlook.com	Yes	Not listed
52.101.11.15	mail-sa9pr02cu00207.inbound.protection.outlook.com	Yes	Not listed
52.101.42.84	mail-co1pr02cu00204.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:f802::2	mail-sj2pr05cu00202.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:f803::	mail-byapr02cu00300.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:f908::8	mail-bnypr05cu00100.inbound.protection.outlook.com	Yes	Not listed
2a01:111:f403:f804::2	mail-co1pr05cu00402.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.

Server software

Detected software	Microsoft Exchange / 365 (from SMTP banner)
SMTP banner	`220 DS1PEPF0001709C.mail.protection.outlook.com Microsoft ESMTP MAIL Service ready at Tue, 25 Aug 2026 02:11:43 +0000 [08DEFE96C4F6F3F1]`

Captured passively during an earlier check — we do not actively scan mail servers.

Domains using this mail server

superselectos.com.sv

What does this mean?

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.