Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
triangle-tech.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 15:38:20 UTC · ↺ Refresh
MX Hostnames
- triangletech-edu02b.mail.protection.outlook.com
MX Priorities
- triangletech-edu02b.mail.protection.outlook.com: 0
A / AAAA Records
- 172.67.202.64 (no PTR)
- 104.21.90.155 (no PTR)
- 2606:4700:3032::ac43:ca40
- 2606:4700:3034::6815:5a9b
Mail Server IPs
- 52.101.194.17 ↩ mail-ch5pr02cu00401.inbound.protection.outlook.com
- 52.101.41.58 ↩ mail-sj0pr02cu00102.inbound.protection.outlook.com
- 52.101.41.4 ↩ mail-sj2pr05cu00204.inbound.protection.outlook.com
- 52.101.194.4 ↩ mail-ch4pr04cu00104.inbound.protection.outlook.com
- 2a01:111:f403:f910:: ↩ mail-cy5pr03cu00300.inbound.protection.outlook.com
- 2a01:111:f403:c801:: ↩ mail-sa9pr02cu00200.inbound.protection.outlook.com
- 2a01:111:f403:f901::1 ↩ mail-bl0pr02cu00601.inbound.protection.outlook.com
- 2a01:111:f403:f804::3 ↩ mail-co1pr03cu00403.inbound.protection.outlook.com
SOA Record
Raw SOA
curt.ns.cloudflare.com dns.cloudflare.com 2397172790 10000 2400 604800 1800
Primary NS (mname)
curt.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2397172790
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
curt.ns.cloudflare.com
yolanda.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:UniversalSpf.org ~include:x.UniversalSpf.org include:spf.protection.outlook.com ip4:71.112.219.5 include:_spf.google.com include:spiceworks.com include:pheaa.org include:aessuccess.org -all
📊 DNS lookups: 7/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._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
3 records- google-site-verification=wXywqKdjbk-yO9D9hnHIenfjBMiUfmpggWB7_0f4Whc
- SPFv=spf1 include:UniversalSpf.org ~include:x.UniversalSpf.org include:spf.protection.outlook.com ip4:71.112.219.5 include:_spf.google.com include:spiceworks.com include:pheaa.org include:aessuccess.org -all
- google-site-verification=X27Kyi9z6U0_dPyTJMbvgYCCiNiqgJhP1LXxXpWaiGE
Full email verification for triangle-tech.edu
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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