jh.edu

Valid Email Server
Domain Lookup › jh.edu

Domain Overview

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

Checked via [email protected] · 2026-03-24 19:39:17 UTC · ↺ Refresh

MX Hostnames

  • smtp.johnshopkins.edu

MX Priorities

  • smtp.johnshopkins.edu: 0

A / AAAA Records

No A/AAAA records found.

Mail Server IPs

  • 128.220.38.15 ↩ smtp.johnshopkins.edu
  • 162.129.199.4 (no PTR)

SOA Record

Raw SOA ens1.jhu.edu hostmaster.jhu.edu 2014172763 3600 600 1209600 3600
Primary NS (mname)
ens1.jhu.edu
Admin Email (rname)
hostmaster@jhu.edu
Serial
2014172763
Refresh
3600s
Retry
600s
Expire
1209600s
Minimum TTL
3600s

Nameservers (NS)

ens1.jhmi.edu
ens1.jhu.edu

SPF Record

✓ Strict (-all)
v=spf1 include:spf1.jh.edu include:spf2.jh.edu ip4:128.220.229.235 ip4:162.129.251.11 ip4:162.129.251.14 ip4:128.220.160.6 ip4:128.220.160.1 include:spf.protection.outlook.com include:service-now.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected];
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

DKIM Selectors

✓ 2 found
google._domainkey
k1._domainkey
✓ Public key: 223 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

26 records
  • yahoo-verification-key=q0jnDlId7267akJWQcNvRtSx1ekvgOXdk+HP8LzCFGA=
  • docusign=58a804e3-eabd-41f6-9d5c-393c0e763aa9
  • apple-domain-verification=5cYZ0nzAStZQ3YFj
  • google-site-verification=Zqo7eheWTj3uB0VKaOgbfj5K5EUR1BmQGhS0PkOI2tA
  • reftab-domain-verification=8676ea3e83856b883706b24466b66474
  • atlassian-domain-verification=v82iuU5jtUo6DLhV8wuZZxOk5KYBZdPh/5H+/GFe2/qw/ulV5gYzSVyg1UvD5xyw
  • miro-verification=8e513fc944e58b7d9832822d3f0dc6da35c73133
  • ZA=6I7U2iv5bGtBQyS0YGfPgg==
  • k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCUje6rrWvjjD1WgoaQin/1q2lvZ8xFdq7aeRr46Xo8ZBbvA9Ar0Drr5ss1vcPPRv2niwMVdlQWrE+tvkQgOopPFj7KBHzVj2JFuiMJI602/uxbY+CQrdhPoeqN5gfYguwk/3H9ybCqVz0hqUPANg9Ygg/oKtGmijirSFGnptUP3QIDAQAB
  • cisco-ci-domain-verification=107f426032014f31e93ba867de15522406a88dc24037e8f5e37cd75338c0e759
  • 5pAChH+wx34IDOtSjAvLNPNvmBssrSdxxHLVPI3NNwSj1DtoxFw32XLNAzx47V56hAPU6wrrs54/cbGDRfP/Cg==
  • docusign=7992f5bc-6cf3-4e44-8ecb-be7a5616c730
  • reftab-domain-verification=44684e552b0baf7813da9d1f17f8814d
  • ca3-44704f7e5e37457a9b14b08b5e9d9378
  • SPFv=spf1 include:spf1.jh.edu include:spf2.jh.edu ip4:128.220.229.235 ip4:162.129.251.11 ip4:162.129.251.14 ip4:128.220.160.6 ip4:128.220.160.1 include:spf.protection.outlook.com include:service-now.com -all
  • anthropic-domain-verification-qbtree=6fmb6FdvehuHyUV6TXcB2W7VW
  • docusign=d53f1c01-202c-4310-b55d-f7bd9488e2a6
  • onetrust-domain-verification=2740a2c1828f4fa99530a3ea4c6dc1e9
  • smartsheet-site-validation=yX1wpBi5dw4KvymUdGbExTQ0kZVpmjjd
  • autodesk-domain-verification=Yc_0e877fciLa-Wffsu-
  • airtable-verification=fad119e56903f5c2210a93351164a436
  • apple-domain-verification=xrmmZNhY01pqJVMH
  • docusign=ff72a9de-d518-44e5-b5c7-5cfa7ecdb030
  • DKIMv=DKIM1;k=rsa;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzQPCEAejADhe7eGlr0xwzSF5QKp4h/RcPZW0ipnedecDE/RCMvzA+1rMOcCutRKf/7Gbe3btYWlUv8J/0/yy9LroVmqQcB5MUOTGInjuWjCQHwmyqpcj0MyScc28mT/ZS4OgKi+/hFlQCk+bdzPPwmZ3peHxVv4nQD0KNTDSbeyKodB4Ix/FFsOTrIoMjqrZDHPLhMRB3oPbjPQUBiobKmD+77hysoGnFVVpz5kImlVx2w0Bq6Tp/SrFAPZEs/YK1L4Om+8AW0vID2oDlFWBI+vVgbpNf8Fqq+fuHY33EbB2qpUheW7/bEReT8oZr2k5a8WDY7BjWxwfiWhpmwPXsQIDAQAB
  • ZOOM_verify_CSLVho-ZRZaN0Ae1uo_a1A
  • MS=ms86683358
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