Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
colorado.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 02:48:34 UTC · ↺ Refresh
MX Hostnames
- colorado-edu.mail.protection.outlook.com
MX Priorities
- colorado-edu.mail.protection.outlook.com: 10
A / AAAA Records
- 151.101.194.133 (no PTR)
- 151.101.2.133 (no PTR)
- 151.101.130.133
- 151.101.66.133
- 2a04:4e42:400::645
- 2a04:4e42:600::645
- 2a04:4e42::645
- 2a04:4e42:200::645
Mail Server IPs
- 52.101.9.2 ↩ mail-mn2pr02cu00202.inbound.protection.outlook.com
- 52.101.9.21 ↩ mail-bl2pr04cu00205.inbound.protection.outlook.com
- 52.101.9.11 ↩ mail-bl2pr04cu00103.inbound.protection.outlook.com
- 52.101.10.1 ↩ mail-bn6pr02cu00301.inbound.protection.outlook.com
- 2a01:111:f403:c922:: ↩ mail-bl0pr03cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c946::1 ↩ mail-ch1pr04cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f901:: ↩ mail-mn2pr04cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c91d:: ↩ mail-mw2pr04cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
a1-153.akam.net dnsadmin.colorado.edu 2026031700 3600 1200 2419200 3600
Primary NS (mname)
a1-153.akam.net
Admin Email (rname)
dnsadmin@colorado.edu
Serial
2026031700
Refresh
3600s
Retry
1200s
Expire
2419200s
Minimum TTL
3600s
Nameservers (NS)
a2-67.akam.net
a20-65.akam.net
a22-67.akam.net
a1-153.akam.net
a11-66.akam.net
a3-66.akam.net
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:128.138.1.0/24 ip4:128.138.48.0/20 ip4:128.138.64.0/18 ip4:128.138.128.0/17 ip4:204.228.68.0/22 ip4:132.194.255.30 ip4:136.147.136.157 include:_spf1.colorado.edu include:_spf2.colorado.edu ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=none; pct=100; adkim=r; aspf=r; rua=mailto:[email protected],mailto:[email protected];
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 7 found
google._domainkey
selector1._domainkey
selector2._domainkey
default._domainkey
mail._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
19 records- atlassian-sending-domain-verification=0b36ce8f-b8ec-42ae-8513-2264ea6d72e7
- bw=E1ibKK7mvTTWmq1SV+b/usJyVdN63EU+WFJh+SCp+abE
- SPFv=spf1 ip4:128.138.1.0/24 ip4:128.138.48.0/20 ip4:128.138.64.0/18 ip4:128.138.128.0/17 ip4:204.228.68.0/22 ip4:132.194.255.30 ip4:136.147.136.157 include:_spf1.colorado.edu include:_spf2.colorado.edu ~all
- _3x6w07ujdy2wk71two4k8r4mwmtw6tq
- jamf-site-verification=V7i5P5-QM02gTP25eIhZIA
- docusign=dcb8d5d8-71e8-4884-8604-02297bea8072
- docusign=7412fd08-3676-471a-8b65-8cc2b13c8137
- d365mktkey=CgcAzx2nkxamTBkNT7jagrT8Nadf6LPzlI0MLQHdKA0x
- atlassian-domain-verification=QAg9aEn1gpS7HapLhSZbdUei9wTKTCl8EKYsTFg5su7bO2Pu30QtUg9QsGZzz1Vw
- d365mktkey=gzYMp5Xcnapx0VINCqRrvMtsD0TBSpLsrFjihN9HWQAx
- yahoo-verification-key=LBMWN06qx3V2Edw1euv/698yUrWMNip2Dx3Y4yyVmYE=
- openai-domain-verification=dv-5hwuyXiWaOnaq12vb3n73azV
- brevo-code:ac843dd83e2d2a3d8becd980f7193d9b
- brevo-code:5f9e8714a4a7c561eb4cdf0848811c11
- MS=ms27269994
- google-site-verification=iaVX54MaxYscXlrL-DxuE9qtvLhAXkXKhG8sjiH5q-0
- brevo-code:d6b523305300718643a7da77b3feeccb
- brevo-code:814ad43e9f25b1a52d6a2b213fcfae73
- bMFGPNmrr7aoZsBWqexbujPiPjVzJe4wrZfl/t81eGptVxvkprdRSqKfj3paVrFcRhsrQHBlMGIR86eXUIYbCw==
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