polk.edu

Valid Email Server
Domain Lookup › polk.edu

Domain Overview

DNS: ✓ 1mo ago Checker: ✓ 1mo ago
polk.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-04-06 12:20:26 UTC · ↺ Refresh

MX Hostnames

  • polk-edu.mail.protection.outlook.com

MX Priorities

  • polk-edu.mail.protection.outlook.com: 0

A / AAAA Records

  • 162.159.134.42 (no PTR)

Mail Server IPs

  • 52.101.11.15 ↩ mail-sa9pr02cu00207.inbound.protection.outlook.com
  • 52.101.194.17 ↩ mail-ch5pr02cu00401.inbound.protection.outlook.com
  • 52.101.10.1 ↩ mail-bn6pr02cu00301.inbound.protection.outlook.com
  • 52.101.41.22 ↩ mail-sj2pr05cu00406.inbound.protection.outlook.com
  • 2a01:111:f403:f90d:: ↩ mail-sn1pr0501cu00200.inbound.protection.outlook.com
  • 2a01:111:f403:f90a::1 ↩ mail-bn8pr03cu00201.inbound.protection.outlook.com
  • 2a01:111:f403:c902::4 ↩ mail-sj0pr03cu01504.inbound.protection.outlook.com
  • 2a01:111:f403:c931:: ↩ mail-sn1pr02cu00100.inbound.protection.outlook.com

SOA Record

Raw SOA ns1.polk.edu dns.polk.edu 2009010574 43200 3600 1209600 180
Primary NS (mname)
ns1.polk.edu
Admin Email (rname)
dns@polk.edu
Serial
2009010574
Refresh
43200s
Retry
3600s
Expire
1209600s
Minimum TTL
180s

Nameservers (NS)

ns1.polk.edu
ns3.polk.edu
ns5.polk.edu
ns4.polk.edu
ns2.polk.edu
ns6.polk.edu

SPF Record

✓ Soft Fail (~all)
v=spf1 include:mailgun.org ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

~ Quarantine
v=DMARC1;p=quarantine;pct=100;rua=mailto:[email protected];ruf=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

DKIM Selectors

✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ DKIM properly configured for selector: selector1

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

All TXT Records

11 records
  • cisco-ci-domain-verification=e29061fc2a11a0599daa07ca86a1991a58a8383615942a001088342b781775c
  • ca3-a28a15d9382f46ac806269a5819c51ca
  • ca3-9638b268d93d4dcc9be3cfe1624f7b68
  • apple-domain-verification=mL3YJSO5osi1IOwi
  • Z1bJsYO2oZ+vejKxX7yM0DhUOLiJqXAIns3Yk0Qw8O2kgRHg1zSqHwN6p85g8Wl4ZDpbOreRP5lz996mtR6bgg==
  • SPFv=spf1 include:mailgun.org ~all
  • adobe-idp-site-verification=0bed49e1-0ba0-4439-89f9-ed496f64c855
  • duo_sso_verification=sHpzEJKNO4a3a3IDtGFoe1kFcvt3csmVizRXLtmCC6gwCjHMsSwXfkEFt2w6qy2A
  • SPFv=spf1 ip4:40.92.0.0/15 ip4:40.107.0.0/16 ip4:52.100.0.0/14 ip4:104.47.0.0/17 ip6:2a01:111:f400::/48 ip6:2a01:111:f403::/49 ip6:2a01:111:f403:8000::/51 ip6:2a01:111:f403:c000::/51 ip6:2a01:111:f403:f000::/52 ip4:216.147.212.20/30 ip4:23.21.109.212 ip4:23.21.109.197 ip4:52.49.201.246 ip4:52.49.235.189 ip4:54.172.84.90 ip4:147.160.167.0/24 ip4:103.28.42.0/24 ip4:27.126.146.0/24 ip4:146.88.28.0/24 ip4:163.47.180.0/22 ip4:64.56.89.61 ip4:203.55.21.0/24 ip4:204.75.142.0/24 ip4:64.56.89.20/32 ip4:64.56.89.18/31 ip4:3.218.253.173 ip4:192.254.112.102 ip4:216.17.93.137 ip4:216.59.51.0/24 ip4:216.235.192.0/24 ip4:216.235.194.0/24 ip4:205.139.103.0/24 ip4:74.123.152.0/22 ip4:205.139.102.0/24 ip4:74.123.152.0/23 ip4:216.235.193.0/24 exists:%{i}._spf.mta.salesforce.com ip4:50.56.130.220/30 ip4:207.97.204.96/29 ip4:146.20.14.104/30 ip4:164.177.132.168/30 include:outboundmail.blackbaud.net include:spf.protection.outlook.com -all include:spf.elluciancloud.com ~all
  • google-site-verification=Z2_zDvE20e5UHBH_YZOUuMvWKgWf69m3P5o12l8fksY
  • MS=ms76370041
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