Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
heartlandexpress.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 01:40:45 UTC · ↺ Refresh
MX Hostnames
- heartlandexpress-com.mail.protection.outlook.com
MX Priorities
- heartlandexpress-com.mail.protection.outlook.com: 10
A / AAAA Records
- 198.185.159.144 (no PTR)
- 198.49.23.145 (no PTR)
- 198.185.159.145
- 198.49.23.144
Mail Server IPs
- 52.101.41.6 ↩ mail-sj0pr03cu01406.inbound.protection.outlook.com
- 52.101.10.12 ↩ mail-bn1pr21cu00204.inbound.protection.outlook.com
- 52.101.11.2 ↩ mail-sn1pr03cu00102.inbound.protection.outlook.com
- 52.101.41.21 ↩ mail-sj2pr05cu00305.inbound.protection.outlook.com
- 2a01:111:f403:f90c:: ↩ mail-sn1pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c902::1 ↩ mail-sj2pr05cu00401.inbound.protection.outlook.com
- 2a01:111:f403:c931::1 ↩ mail-sa9pr03cu00201.inbound.protection.outlook.com
- 2a01:111:f403:f902:: ↩ mail-bl2pr04cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
ns5.worldnic.com namehost.worldnic.com 125082015 10800 3600 604800 3600
Primary NS (mname)
ns5.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
125082015
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns5.worldnic.com
ns6.worldnic.com
SPF Record
✓ Soft Fail (~all)
v=spf1 mx ip4:159.183.182.251 ip4:159.183.132.243 ip4:108.160.233.109 ip4:108.160.230.159 include:spf.sendinblue.com include:_spf.salesforce.com include:spf.protection.outlook.com ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; 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
✓ 3 found
selector1._domainkey
selector2._domainkey
mail._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
12 records- apple-domain-verification=uxYr02m72ZYzf6q8
- tlulic3f098jbps79nejfci3q7
- SPFv=spf1 mx ip4:159.183.182.251 ip4:159.183.132.243 ip4:108.160.233.109 ip4:108.160.230.159 include:spf.sendinblue.com include:_spf.salesforce.com include:spf.protection.outlook.com ~all
- duo_sso_verification=5ubJgbGdLPKxUsx3RvIRE13nvjgmcLs7367JU9a8XcWs91nwXdE1qkGiNJCFEZrh
- knowbe4-site-verification=8d65b35ce2c808bb6cf3a9e498535275
- MS=ms21242904
- c133560e70f837f18658c1f2aceb3b508708d3c37615cfc804
- q9rjp1eun9vtutvkvkoctkkj2a
- taag424lhvv9jf3e2homum4iqd
- MS=ms57451460
- Sendinblue-code:f6637754394f9eb8732715a6b0e167d6
- smartsheet-site-validation=ov66p_uQQ3RPZbV3deNWC5JDLL5L1UV7
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