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checkeremail.com

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

IP & reverse DNS

IP addressReverse DNS (PTR)FCrDNSDNSBL
83.166.143.57mx01.infomaniak.chYesNot listed
83.166.143.58mx02.infomaniak.chYesNot listed
2001:1600::aaaa:0:0:1:4mx02.infomaniak.chNoNot listed
2001:1600::aaaa:0:0:1:3mx01.infomaniak.chYesNot 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 softwareMicrosoft Exchange / 365 (from SMTP banner)
SMTP banner220 smtp-4-9003.mail.infomaniak.ch ESMTP Infomaniak Network Mail Exchanger

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

Domains using this mail server

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.

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