Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
computerhistory.org
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 02:57:16 UTC · ↺ Refresh
MX Hostnames
- computerhistory-org.mail.protection.outlook.com
MX Priorities
- computerhistory-org.mail.protection.outlook.com: 0
A / AAAA Records
- 104.21.17.220 (no PTR)
- 172.67.178.154 (no PTR)
- 2606:4700:3035::6815:11dc
- 2606:4700:3035::ac43:b29a
Mail Server IPs
- 52.101.8.42 ↩ mail-dm6pr03cu00402.inbound.protection.outlook.com
- 52.101.10.5 ↩ mail-bn6pr04cu00105.inbound.protection.outlook.com
- 52.101.41.28 ↩ mail-sj0pr03cu01504.inbound.protection.outlook.com
- 52.101.10.2 ↩ mail-bn8pr03cu00202.inbound.protection.outlook.com
- 2a01:111:f403:f802:: ↩ mail-byapr05cu00400.inbound.protection.outlook.com
- 2a01:111:f403:f902:: ↩ mail-bl2pr04cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f901:: ↩ mail-mn2pr04cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c801:: ↩ mail-sa9pr02cu00200.inbound.protection.outlook.com
SOA Record
Raw SOA
mia.ns.cloudflare.com dns.cloudflare.com 2398321505 10000 2400 604800 1800
Primary NS (mname)
mia.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398321505
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
randy.ns.cloudflare.com
mia.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:spf.pantheon.io mx include:_spf.salesforce.com include:22740101.spf03.hubspotemail.net include:spf.ticketure.com include:mailgun.org include:_spf.psm.knowbe4.com -all
📊 DNS lookups: 8/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; sp=none; ri=86400
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
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
16 records- 1JPhzj9k7fEHgtsngDZNS6yfV03c0x5VyuvqC4odAJkWfpEFvI9mD72+vQiSbKOtDMvUyMNqklKmOw+OSnnOGA==
- MS=ms12064115
- gJPngtlEoee5tmwh7SsQYLjyX5sIac7gbdszvgbHPluMG1oiUo8PIlF0NqxwNAHCjePqMKlQQgd2pg++4MOX+g==
- rm_verify=b4106fa28e
- _globalsign-domain-verification=w4J1QxPn3aNctgVGzY51pbeSFxpzwNCjLN4HV-i699
- docusign=5c1c9cad-846f-41c0-9049-a0cbe3169cfb
- SPFv=spf1 include:spf.protection.outlook.com include:spf.pantheon.io mx include:_spf.salesforce.com include:22740101.spf03.hubspotemail.net include:spf.ticketure.com include:mailgun.org include:_spf.psm.knowbe4.com -all
- MS=498D467512A4DA933158597F4042806719B8E25B
- google-site-verification=p5tnnWmagFi2txnFJKyqJhSWZaKddUMCc6sKK-zCX5M
- lgpoa4pn3skmfbm0f4amo8fruc
- openai-domain-verification=dv-LxzDCWHjzW2cxVrmyRlJZ4So
- nfM5CrwvDFasS6IfAOTkTvjNzm7gYjif2NEd49JW97+JBXBTD0dGmQDeyu/RnpXC76UvmzlMQm8KbMAN1MTHvg==
- facebook-domain-verification=og8r6zl8mxkeszsryklveiywpkyzuq
- _globalsign-domain-verification=a0QaafMZgRS0DbVMw3XLx2rdUg41VfP9I_fBBuSk-m
- apple-domain-verification=zj49fL4xByFmwuNN
- mPvdaxG4vvybwa8VZI0J4AncjCIh3T75uHBGRwH3TSD1kU8XFwFx0yDDAbsgB7n+UZ3fAELT6dI16V6eFHSTJA==
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