Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
redblue.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-22 04:30:28 UTC · ↺ Refresh
MX Hostnames
- redblue-com.mail.protection.outlook.com
MX Priorities
- redblue-com.mail.protection.outlook.com: 10
A / AAAA Records
- 199.16.172.238 (no PTR)
- 199.16.173.228 (no PTR)
Mail Server IPs
- 52.101.42.14 ↩ mail-mw2pr04cu00106.inbound.protection.outlook.com
- 52.101.11.13 ↩ mail-sn1pr0501cu00205.inbound.protection.outlook.com
- 52.101.40.0 ↩ mail-cy5pr03cu00300.inbound.protection.outlook.com
- 52.101.40.4 ↩ mail-cy5pr03cu00204.inbound.protection.outlook.com
- 2a01:111:f403:f913::1 ↩ mail-cy5pr05cu00101.inbound.protection.outlook.com
- 2a01:111:f403:c927:: ↩ mail-bn6pr21cu00500.inbound.protection.outlook.com
- 2a01:111:f403:c946::6 ↩ mail-ch5pr02cu00406.inbound.protection.outlook.com
- 2a01:111:f403:c946::5 ↩ mail-ch4pr21cu00105.inbound.protection.outlook.com
SOA Record
Raw SOA
ns10.digicertdns.com dns.digicertdns.com 2009010163 43200 3600 1209600 180
Primary NS (mname)
ns10.digicertdns.com
Admin Email (rname)
dns@digicertdns.com
Serial
2009010163
Refresh
43200s
Retry
3600s
Expire
1209600s
Minimum TTL
180s
Nameservers (NS)
ns1.openhostingservice.com
ns4.openhostingservice.com
ns5.openhostingservice.com
ns3.openhostingservice.com
ns2.openhostingservice.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.cmsa.buildops.com include:mg-spf.greenhouse.io include:_spf.intacct.com include:spf.protection.outlook.com -all
📊 DNS lookups: 4/10
✓ 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
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 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
3 records- SPFv=spf1 include:spf.cmsa.buildops.com include:mg-spf.greenhouse.io include:_spf.intacct.com include:spf.protection.outlook.com -all
- intacct-esk=B7C7E7C57C1653E3E0539A220D0AE5C4
- atomic-domain-f442c4ce0ad1c7d69b562d1e95d3e513a139ad1ec7955c010feda69719b5b2aa
Full email verification for redblue.com
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