ntu.edu.sg

Valid Email Server
Domain Lookup › ntu.edu.sg

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
ntu.edu.sg
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-19 12:59:29 UTC · ↺ Refresh

MX Hostnames

  • ntu.in.tmes.trendmicro.com

MX Priorities

  • ntu.in.tmes.trendmicro.com: 10

A / AAAA Records

  • 104.16.4.14 (no PTR)

Mail Server IPs

  • 18.208.22.78 ↩ in.tmes.trendmicro.com
  • 18.208.22.79 ↩ in.tmes.trendmicro.com
  • 18.208.22.77 ↩ in.tmes.trendmicro.com
  • 18.208.22.80 ↩ in.tmes.trendmicro.com

SOA Record

Raw SOA ndc-hiddenmaster.ntu.edu.sg nss_servicedesk.ntu.edu.sg 430594453 1200 180 1209600 3600
Primary NS (mname)
ndc-hiddenmaster.ntu.edu.sg
Admin Email (rname)
nss_servicedesk@ntu.edu.sg
Serial
430594453
Refresh
1200s
Retry
180s
Expire
1209600s
Minimum TTL
3600s

Nameservers (NS)

sdc-dns-ext-02.ntu.edu.sg
secdns.cyberway.com.sg
secdns2.cyberway.com.sg
ndc-dns-ext-01.ntu.edu.sg

SPF Record

✓ Strict (-all)
v=spf1 ip4:155.69.5.218 ip4:155.69.24.187 ip4:155.69.25.226 ip4:155.69.25.244 ip4:155.69.5.242 ip4:155.69.5.113 ip4:149.56.182.220 ip4:94.23.120.168 ip4:23.251.233.28 include:spfext.ntu.edu.sg include:spf.protection.outlook.com include:marketing.dynamics.com include:outboundmail.blackbaud.net include:7571598.spf05.hubspotemail.net include:sendgrid.net include:ap.rp.oracleemaildelivery.com include:amazonses.com -all
📊 DNS lookups: 8/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; sp=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; ri=86400
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine

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

26 records
  • google-site-verification=q6eRV63xn_rWdNKmXu9pQT6D4zksWDbHffZOV13GA8Y
  • google-site-verification=B5pDvca0m9WKVnsXLHHY09vguc7jJC6NsT9T2CdTEGo
  • infoblox-domain-mastery=afb4e9a4797f404cf8b2c089b9f68bcd1f2fc88b8ee8fba44d25902bd483c953ca
  • apple-domain-verification=yfBH4Jn5hpLwAAMm
  • facebook-domain-verification=dna9ern89lrik11avfttdh0q0mq6bp
  • MS=ms69007024
  • adobe-idp-site-verification=6eb5dd45be203d77958b56b17ef30f078f4ce799ed76dce89a36ab3096360bec
  • openatts a=dns-did; p=did:ethr:0x3d12104c4d77570636ae36d1cffc1cf563c781bb#controller; v=1.0;
  • openatts net=ethereum netId=1 addr=0x61783202d023fd08dcc7d7ca8a196697c46c9d57
  • openatts net=ethereum netId=137 addr=0xb0bA40C99814ABF85b668bc37aBfBC5a26b343a8
  • openatts a=dns-did; p=did:ethr:0xb444a0ac5753a2684099c934bf4119b0bd8e35d3#controller; v=1.0;
  • _uc6m5qwgifde0wnuyjhfevmd0n0nwye
  • atlassian-domain-verification=j0NuBrC3Fso4yjfiDyksZje3OOPtNEGkcVsauZvXoX7EMUMcXwTCkcwB/smoDnHv
  • GVWSDN5OSCXAIOF04KMT5W8UPY4ZYRU6LR4G2INPT
  • IGHDQK0R7ISP3IUX7MUU3LKLMT7793SIRZEKQQR3Z
  • Dynatrace-site-verification=7d0a2f11-c2de-46a9-a3cd-378cc5d1d07b__ila8hmgf1263v5hbrtvpa6d0mr
  • openatts net=ethereum netId=1 addr=0x6bf2602b25752c4e3785951e7b95196c1d3ab29d
  • vosaic-verification=VcBdIf5PDsf3coZ
  • google-site-verification=paxVwUN60tJt34UY7d1tfPoxH4eRzr3n0ykB5rieXj8
  • amazonses:mBVPk6naV4iVXTFpT1XmYFQCGDWBfhDSi+4j8yZrsyc=
  • tmes=99be067df2982a59c87e33712dea44de
  • denodo-agora-domain-verification=ec56a43b-e7e0-4047-8fb1-30b05352d0ff
  • facebook-domain-verification=fcjy54pw7119yl41hmrmxhha6kibjj
  • SPFv=spf1 ip4:155.69.5.218 ip4:155.69.24.187 ip4:155.69.25.226 ip4:155.69.25.244 ip4:155.69.5.242 ip4:155.69.5.113 ip4:149.56.182.220 ip4:94.23.120.168 ip4:23.251.233.28 include:spfext.ntu.edu.sg include:spf.protection.outlook.com include:marketing.dynamics.com include:outboundmail.blackbaud.net include:7571598.spf05.hubspotemail.net include:sendgrid.net include:ap.rp.oracleemaildelivery.com include:amazonses.com -all
  • d365mktkey=6xMa0vU71ZR2ixK5mG5UV5Ug1iKHb19h63fMefwmpiUx
  • 6lwRPCZn=940d623d41ca8c8865e8c732bee52469
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