Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
jhhc.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-25 20:48:18 UTC · ↺ Refresh
MX Hostnames
- mail.jhhc.com
- jhhc-com.mail.protection.office365.us
- mail1.jhhc.com
MX Priorities
- jhhc-com.mail.protection.office365.us: 0
- mail1.jhhc.com: 10
- mail.jhhc.com: 10
A / AAAA Records
- 128.220.193.2 (no PTR)
Mail Server IPs
- 23.103.199.138 ↩ mail-bn3usg020138.inbound.protection.outlook.com
- 23.103.199.170 ↩ mail-cy1usg020170.inbound.protection.outlook.com
- 162.129.22.131 ↩ mail1.jhhc.com
- 162.129.22.130 ↩ mail.jhhc.com
SOA Record
Raw SOA
ens1.jhu.edu hostmaster.jhu.edu 2021112950 1200 3600 1209600 3600
Primary NS (mname)
ens1.jhu.edu
Admin Email (rname)
hostmaster@jhu.edu
Serial
2021112950
Refresh
1200s
Retry
3600s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
ens1.jhu.edu
ens1.jhmi.edu
SPF Record
✓ Strict (-all)
v=spf1 ip4:162.129.22.0/24 ip4:12.181.141.0/24 ip4:23.21.109.212 ip4:147.160.167.0/26 a:alt1.aspmx.l.google.com a:alt2.aspmx.l.google.com a:aspmx.l.google.com mx:healthtrioconnect.com include:mailgun.org include:spf.protection.office365.us -all
📊 DNS lookups: 6/10
✓ 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
selector1._domainkey
selector2._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
2 records- "MS=ms23999802"
- SPFv=spf1 ip4:162.129.22.0/24 ip4:12.181.141.0/24 ip4:23.21.109.212 ip4:147.160.167.0/26 a:alt1.aspmx.l.google.com a:alt2.aspmx.l.google.com a:aspmx.l.google.com mx:healthtrioconnect.com include:mailgun.org include:spf.protection.office365.us -all
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