Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
o-n.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-18 15:07:28 UTC · ↺ Refresh
MX Hostnames
- on-com0c.mail.protection.outlook.com
MX Priorities
- on-com0c.mail.protection.outlook.com: 10
A / AAAA Records
- 23.251.147.71 ↩ 71.147.251.23.bc.googleusercontent.com
Mail Server IPs
- 52.101.41.6 ↩ mail-sj0pr03cu01406.inbound.protection.outlook.com
- 52.101.11.10 ↩ mail-sa9pr03cu00202.inbound.protection.outlook.com
- 52.101.9.14 ↩ mail-bl0pr03cu00206.inbound.protection.outlook.com
- 52.101.10.1 ↩ mail-bn6pr02cu00301.inbound.protection.outlook.com
- 2a01:111:f403:f908:: ↩ mail-bn1pr21cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c946::7 ↩ mail-ch5pr02cu00307.inbound.protection.outlook.com
- 2a01:111:f403:f902::2 ↩ mail-mn2pr02cu00202.inbound.protection.outlook.com
- 2a01:111:f403:c946::1 ↩ mail-ch1pr04cu00101.inbound.protection.outlook.com
SOA Record
Raw SOA
ns20.digicertdns.com dns.digicertdns.com 2009010149 43200 3600 1209600 180
Primary NS (mname)
ns20.digicertdns.com
Admin Email (rname)
dns@digicertdns.com
Serial
2009010149
Refresh
43200s
Retry
3600s
Expire
1209600s
Minimum TTL
180s
Nameservers (NS)
ns3.propersky.com
ns4.propersky.com
ns6.propersky.com
ns5.propersky.com
ns2.propersky.com
ns1.propersky.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:52.1.234.206 ip4:52.70.152.226 ip4:54.165.79.164 ip4:152.186.238.90 include:spf-us.emailsignatures365.com include:spf.protection.outlook.com include:servers.mcsv.net include:spf.constantcontact.com include:sendgrid.net -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 5 found
selector1._domainkey
selector2._domainkey
k1._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 ip4:52.1.234.206 ip4:52.70.152.226 ip4:54.165.79.164 ip4:152.186.238.90 include:spf-us.emailsignatures365.com include:spf.protection.outlook.com include:servers.mcsv.net include:spf.constantcontact.com include:sendgrid.net -all
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