Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
jhu.edu
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-19 16:57:18 UTC · ↺ Refresh
MX Hostnames
- smtp.johnshopkins.edu
MX Priorities
- smtp.johnshopkins.edu: 1
A / AAAA Records
- 128.220.193.2 (no PTR)
Mail Server IPs
- 128.220.38.15 ↩ smtp.johnshopkins.edu
- 162.129.199.4 (no PTR)
SOA Record
Raw SOA
ens1.jhu.edu empty.empty 2014173050 3600 600 1209600 3600
Primary NS (mname)
ens1.jhu.edu
Admin Email (rname)
empty@empty
Serial
2014173050
Refresh
3600s
Retry
600s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
ens1.jhmi.edu
ens1.jhu.edu
SPF Record
✓ Strict (-all)
v=spf1 ip4:128.220.39.0/24 ip4:162.129.199.0/24 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 ip4:128.220.40.0/24 include:spf.protection.outlook.com include:service-now.com -all
📊 DNS lookups: 2/10
✓ 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
✓ 3 found
k1._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: k1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
36 records- google-site-verification=czjH79sUqAY6z7WdhXo0K3Z_uB8PQrWPoYZFLyG2ZyI
- google-site-verification=PogZzKp2fPlmh5CJooxo4w6DOBZvtzxL0aBOsSiGZwI
- asv=5da62ba592bab3d1542dbbf409a762ee
- STKWsca/U+sp2fESD+L8E88fJJ/CVjPAf5Td1GTp3H+Qp45vNgVnofYNV9mj4wsk8YaFZSVLsFxNzJNg9vAlYA==
- google-site-verification=OYMuhxFsKdAKd7rlfSh6j9u2RU7ZlLOIMb-apkt_TLE
- airtable-verification=79c988870bd1359906d21b0f994f3e00
- facebook-domain-verification=fui05pg5padt3lqjitadnizlq80543
- include:50639708.spf04.hubspotemail.netv=spf1 ip4:128.220.39.0/24 ip4:162.129.199.0/24 ip4:162.129.251.11 ip4:162.129.251.14 ip4:128.220.160.6 ip4:128.220.160.1 ip4:128.220.40.0/24 include:spf.protection.outlook.com include:service-now.com -all
- facebook-domain-verification=w4q5d6dqct374zdq9lk2a8yfsucsne
- apple-domain-verification=puEi9pYMYXEBi6bg
- docusign=e0788c6f-1ca1-40be-b4f8-7e1516c85ef1
- ca3-54ded686d84a42a6a8e74e31814ecad8
- atlassian-domain-verification=v82iuU5jtUo6DLhV8wuZZxOk5KYBZdPh/5H+/GFe2/qw/ulV5gYzSVyg1UvD5xyw
- facebook-domain-verification=llmgbgm34s61kngl4fu1njobuwv9dc
- anthropic-domain-verification-swf0eb=RQ8Zfyg8S3PQ2BZYxq1laA9K6
- docusign=47d09d1e-f20e-45ae-8348-9e0cde59d212
- addevent=verification
- e2ma-verification=e15fb
- google-site-verification=Hdg6lOHShC5P7Lb-ffkmurUN4E5BFTJ3NLZJu_9veDk
- ZOOM_verify_HBPKAym7Tz-eFLcbrv5qMQ
- 6d0krd2r1m6d4rfp4y16ryvjq72x1wj4
- be53a892b3bf7129c12261ba89e8317ddc94023220d76fd9fa150b6d4b8f5c24
- apple-domain-verification=42Nv9AYu4nSWv2l4
- google-site-verification=ilMpBs6aLedW4vFTLGnCyGYoQuSB5azucOxwxSMIsbg
- google-site-verification=5Zsy53rEK-hXGheCVnv_KOA9ga3WMOe8LQlInYaE668
- AppId=000000004C0DFC04
- docusign=73173acb-df50-4cbd-b139-cc9adedeae7d
- xr53hrygrc5x351yc9rts2ggkv08kb3k
- smartsheet-site-validation=o1IiE_3MJXBZ0xFwfwhtOhRmrOKxm1A8
- wkq43htjtz52dntbmtjw17pv0tqbbv0m
- SPFv=spf1 ip4:128.220.39.0/24 ip4:162.129.199.0/24 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 ip4:128.220.40.0/24 include:spf.protection.outlook.com include:service-now.com -all
- docusign=29c2d014-367b-4c7c-a9fe-d6512a2f37b1
- cisco-ci-domain-verification=4076af602b47f3714aa27fbdc0e14da0ca421ee8838942eabd7409b638930e39
- ERF+yrd/ZMTjPnD5bs/nBFo+y0qQgnrv6og7UQaJONReXkEFyLl3peWV1tnVep8tHaJ1RgDgxvRplFYItpeyMw==
- google-site-verification=_78PEuF0BsnxniCMxdFGUXI8-rKuzXbA8w65yi5lRIs
- facebook-domain-verification=og2369fpji19hzsapehl97bxys6cna
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