yonsei.ac.kr

Valid Email Server
Domain Lookup › yonsei.ac.kr

Domain Overview

DNS: ✓ 1d ago Checker: ✓ 1d ago
yonsei.ac.kr
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-07-27 19:59:52 UTC · ↺ Refresh

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MX Hostnames

  • alt1.aspmx.l.google.com
  • alt4.aspmx.l.google.com
  • alt2.aspmx.l.google.com
  • alt3.aspmx.l.google.com
  • aspmx.l.google.com

MX Priorities

  • alt3.aspmx.l.google.com: 10
  • alt1.aspmx.l.google.com: 5
  • aspmx.l.google.com: 1
  • alt2.aspmx.l.google.com: 5
  • alt4.aspmx.l.google.com: 10

A / AAAA Records

  • 165.132.13.87

Mail Server IPs

  • 192.178.223.27 ↩ yulhrs-in-f27.1e100.net
  • 2a00:1450:4009:c0f::1a ↩ yulhrs-in-f26.1e100.net
  • 108.177.123.26 ↩ lcscld-in-f26.1e100.net
  • 2800:3f0:4003:c0f::1b (no PTR)
  • 64.233.180.27 ↩ pe-in-f27.1e100.net
  • 2607:f8b0:4004:c08::1b ↩ bi-in-f27.1e100.net
  • 172.253.116.27 ↩ dj-in-f27.1e100.net
  • 2a00:1450:400b:c02::1a ↩ dj-in-f26.1e100.net
  • 172.253.157.27 ↩ yubrupd-in-f27.1e100.net
  • 2a00:1450:400c:c23::1b ↩ yubrupd-in-f27.1e100.net

SOA Record

Raw SOA ns.yonsei.ac.kr network.yonsei.ac.kr 2007121883 10800 3600 604800 900
Primary NS (mname)
ns.yonsei.ac.kr
Admin Email (rname)
network@yonsei.ac.kr
Serial
2007121883
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
900s

Nameservers (NS)

yumciris.yonsei.ac.kr
ns3.yonsei.ac.kr
ns2.yonsei.ac.kr
ns.yonsei.ac.kr

SPF Record

✓ Strict (-all)
v=spf1 include:_spf1.yonsei.ac.kr include:_spf2.yonsei.ac.kr include:_spf3.yonsei.ac.kr include:_spf4.yonsei.ac.kr include:_spf.google.com include:mailplug.com -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected], mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected], mailto:[email protected]

DKIM Selectors

✓ 1 found
google._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

7 records
  • google-site-verification=2rsjpJZLg1FwN9g_C1Q6d_e9nGkHaRXSrThEU0jYzuI
  • google-site-verification=ZGV1Un5NAw8C5RKLmE6UMUHzUfTRZaTkSDir7KWihy4
  • _ztpcrsw20d03lwqjio8xex8mtirplab
  • SPFv=spf1 include:_spf1.yonsei.ac.kr include:_spf2.yonsei.ac.kr include:_spf3.yonsei.ac.kr include:_spf4.yonsei.ac.kr include:_spf.google.com include:mailplug.com -all
  • google-site-verification=9nWmjG3yoyHVAJ_7-X4PNxHqfbCAfE0sRagOClhnJ-k
  • worksmobile.certification.jx9zlodqjilmsa2ywc.dber4coldpssnw.tbdbovwpy
  • google-site-verification=g8lpRpYZZWz0VwTd-LPHz08KQlB77pIo13YV-Yox9nc
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