Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
sutd.edu.sg
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-30 05:45:14 UTC · ↺ Refresh
MX Hostnames
- sutd-edu-sg.mail.protection.outlook.com
MX Priorities
- sutd-edu-sg.mail.protection.outlook.com: 0
A / AAAA Records
- 45.60.65.5 (no PTR)
- 45.60.67.5 (no PTR)
Mail Server IPs
- 52.101.124.117 ↩ mail-tydpr03cu00105.inbound.protection.outlook.com
- 52.101.137.0 ↩ mail-sg2pr03cu00500.inbound.protection.outlook.com
- 52.101.157.80 ↩ mail-os8pr02cu00100.inbound.protection.outlook.com
- 2a01:111:f403:cc1f::4 ↩ mail-os8pr02cu00104.inbound.protection.outlook.com
- 2a01:111:f403:cc09:: ↩ mail-sg2pr03cu00500.inbound.protection.outlook.com
- 2a01:111:f403:cc1a::8 ↩ mail-tydpr03cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.sutd.edu.sg hostmaster.sutd.edu.sg 652133164 1200 180 1209600 3600
Primary NS (mname)
ns1.sutd.edu.sg
Admin Email (rname)
hostmaster@sutd.edu.sg
Serial
652133164
Refresh
1200s
Retry
180s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
ns3.sutd.edu.sg
secdns2.starhub.net.sg
ns1.sutd.edu.sg
SPF Record
✓ Strict (-all)
v=spf1 ip4:103.24.77.20 ip4:202.94.70.20 ip4:103.24.77.29 ip4:202.94.70.29 include:spf.protection.outlook.com include:_spf.explore-blue.com include:spf-ap.exlibrisgroup.com include:_spf.wpvip.com include:_spf.psm.knowbe4.com -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected]; sp=none; fo=1
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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
12 records- wpvip-domainverification=3c883edbde57f781c1ba714a6786f89922aa73b5705ce5e4aab2df906f24a12e
- globalsign-domain-verification=922B7BF25BE3C8BC539E9138E5DDB035
- SPFv=spf1 ip4:103.24.77.20 ip4:202.94.70.20 ip4:103.24.77.29 ip4:202.94.70.29 include:spf.protection.outlook.com include:_spf.explore-blue.com include:spf-ap.exlibrisgroup.com include:_spf.wpvip.com include:_spf.psm.knowbe4.com -all
- msfpkey=5wqf8ngd16efn0o04h1f8gq9d
- flexera-domain-verification-twxuiqabmnxydplg
- workplace-domain-verification=i7mx4l0Hv1p8mp8kJfJyVk3H31BM9f
- globalsign-domain-verification=E67326DB41D73DE0ADD7867DCE64FAB5
- globalsign-domain-verification=ca66fe70ae851c99da640c3df5dfbabe
- google-site-verification=gfLXPDK599jxeRZWmFthrpB1waWNee3R-YU2KTx1Yec
- _globalsign-domain-verification=LkUMx0z_IbU_v9fcTIpwWCrZ5rhitC7sdXAJL2iT8f
- _globalsign-domain-verification=za2PlGerDBENNqyl7XrpQ0DBJXaThoS-xaOCyapSP-
- DMARCv=DMARC1\;p=reject\;adkim=r\;rua=mailto:[email protected]
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