Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
principiacollege.edu
Yes
✓ Yes
Proofpoint
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 06:38:46 UTC · ↺ Refresh
MX Hostnames
- mxb-00386001.gslb.pphosted.com
- mxa-00386001.gslb.pphosted.com
MX Priorities
- mxa-00386001.gslb.pphosted.com: 0
- mxb-00386001.gslb.pphosted.com: 0
A / AAAA Records
- 104.17.70.73 (no PTR)
Mail Server IPs
- 148.163.133.45 ↩ mx0a-00386001.pphosted.com
- 148.163.137.45 ↩ mx0b-00386001.pphosted.com
SOA Record
Raw SOA
ns1.fastzonefiles.net hostmaster.principiacollege.edu 2025103030 21600 10800 604800 3600
Primary NS (mname)
ns1.fastzonefiles.net
Admin Email (rname)
hostmaster@principiacollege.edu
Serial
2025103030
Refresh
21600s
Retry
10800s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns5.by-design.net
ns3.fastzonefiles.net
ns1.fastzonefiles.net
ns4.by-design.net
ns2.fastzonefiles.net
SPF Record
✓ Strict (-all)
v=spf1 include:_u.principiacollege.edu._spf.smart.ondmarc.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; sp=reject; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]; adkim=r; aspf=r; fo=0; rf=afrf; ri=64800
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
↳ Subdomain policy: reject
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
3 records- vlpmi4mpvm4tcqqg6jc71h93km
- SPFv=spf1 include:_u.principiacollege.edu._spf.smart.ondmarc.com -all
- facebook-domain-verification=8zoct1k77z22b4tw3c2ikpr372opjf
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