Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
geisinger.org
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 03:48:34 UTC · ↺ Refresh
MX Hostnames
- geisinger-org.mail.protection.outlook.com
MX Priorities
- geisinger-org.mail.protection.outlook.com: 0
A / AAAA Records
- 167.86.46.247 (no PTR)
Mail Server IPs
- 52.101.10.12 ↩ mail-bn1pr21cu00204.inbound.protection.outlook.com
- 52.101.40.1 ↩ mail-cy4pr03cu00101.inbound.protection.outlook.com
- 52.101.194.3 ↩ mail-ch1pr04cu00103.inbound.protection.outlook.com
- 52.101.41.21 ↩ mail-sj2pr05cu00305.inbound.protection.outlook.com
- 2a01:111:f403:c91d:: ↩ mail-mw2pr04cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f802::3 ↩ mail-sj0pr03cu01403.inbound.protection.outlook.com
- 2a01:111:f403:f903:: (no PTR)
- 2a01:111:f403:c92c::3 ↩ mail-dm5pr04cu00103.inbound.protection.outlook.com
SOA Record
Raw SOA
infoblox.geisinger.edu dnsdhcpusers.geisinger.edu 1386 10800 3600 2419200 900
Primary NS (mname)
infoblox.geisinger.edu
Admin Email (rname)
dnsdhcpusers@geisinger.edu
Serial
1386
Refresh
10800s
Retry
3600s
Expire
2419200s
Minimum TTL
900s
Nameservers (NS)
ns228ext.geisinger.edu
ns65ext.geisinger.edu
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:spf.z182.zixworks.com ip4:68.232.200.48 ip4:159.140.194.40/29 ip4:216.110.81.52 ip4:66.162.32.179 ip4:97.68.189.130 ip4:64.129.157.76 ip4:206.169.138.253 ip4:54.240.47.81 -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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
7 records- apple-domain-verification=V-9rKOBTFjhXkEtczzW8QGQC7WboAmw84HMXkUQzL5c
- identrust_validate=AJks4cKA24jIcJFItC9hWmFccI4WrVlXzMWRhazh1fbB
- SPFv=spf1 include:spf.protection.outlook.com include:spf.z182.zixworks.com ip4:68.232.200.48 ip4:159.140.194.40/29 ip4:216.110.81.52 ip4:66.162.32.179 ip4:97.68.189.130 ip4:64.129.157.76 ip4:206.169.138.253 ip4:54.240.47.81 -all
- 53F3-1705-C5FE-4B56-7D03-FC68-A601-923A
- 9047-9746-282F-67D5-5A90-D32A-16D0-2471
- google-site-verification=lI9dKksEDRmUL7IjaXuxu3FwJpi4gnZdG4hti-ZvB6Q
- google-site-verification=yuGGgolirDtpJ8DVDRbVnqwNBFLRP7M8LOHPwQmiIiI
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