calvin.edu

Valid Email Server
Domain Lookup › calvin.edu

Domain Overview

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

Checked via [email protected] · 2026-03-19 10:24:07 UTC · ↺ Refresh

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MX Hostnames

  • mxa-002f7301.gslb.pphosted.com
  • mxb-002f7301.gslb.pphosted.com

MX Priorities

  • mxb-002f7301.gslb.pphosted.com: 10
  • mxa-002f7301.gslb.pphosted.com: 10

A / AAAA Records

  • 23.185.0.3 (no PTR)
  • 2620:12a:8001::3 (no PTR)
  • 2620:12a:8000::3 (no PTR)

Mail Server IPs

  • 148.163.143.211 ↩ mx0b-002f7301.pphosted.com
  • 148.163.146.16 ↩ mx0a-002f7301.pphosted.com

SOA Record

Raw SOA dns.calvin.edu dns-admin.calvin.edu 2260316001 3600 1800 1209600 3600
Primary NS (mname)
dns.calvin.edu
Admin Email (rname)
dns-admin@calvin.edu
Serial
2260316001
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
3600s

Nameservers (NS)

dns2.calvin.edu
dns.calvin.edu

SPF Record

✓ Soft Fail (~all)
v=spf1 ip4:148.163.143.211 ip4:148.163.146.16 ip4:153.106.124.191 ip4:153.106.124.17 ip4:153.106.142.10 ip4:153.106.135.33 ip4:153.106.124.21 include:_spf1.calvin.edu ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected];
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

DKIM Selectors

✓ 2 found
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: s1

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

2 records
  • SPFv=spf1 ip4:148.163.143.211 ip4:148.163.146.16 ip4:153.106.124.191 ip4:153.106.124.17 ip4:153.106.142.10 ip4:153.106.135.33 ip4:153.106.124.21 include:_spf1.calvin.edu ~all
  • atlassian-domain-verification=DjNBBBOlarzEnFCvY9k/XKjLNq3a45aOAH/hB8dfX42LNc8NtbnpmXk8WhXHZ0oy
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