Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rexelholdingsusa.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 00:09:20 UTC · ↺ Refresh
MX Hostnames
- rexelholdingsusa-com.mail.eo.outlook.com
MX Priorities
- rexelholdingsusa-com.mail.eo.outlook.com: 0
A / AAAA Records
- 104.18.16.157 (no PTR)
- 104.18.17.157 (no PTR)
- 2606:4700::6812:119d (no PTR)
- 2606:4700::6812:109d (no PTR)
Mail Server IPs
- 52.101.68.16 ↩ mail-db4pr02cu00400.inbound.protection.outlook.com
- 52.101.73.28 ↩ mail-am7pr05cu00204.inbound.protection.outlook.com
- 52.101.68.15 ↩ mail-db6pr03cu00107.inbound.protection.outlook.com
- 52.101.73.153 ↩ mail-as8pr05cu00401.inbound.protection.outlook.com
SOA Record
Raw SOA
alaric.ns.cloudflare.com dns.cloudflare.com 2399150264 10000 2400 604800 1800
Primary NS (mname)
alaric.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399150264
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
alaric.ns.cloudflare.com
ursula.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 mx ip4:192.138.162.55 include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 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
4 records- SPFv=spf1 mx ip4:192.138.162.55 include:spf.protection.outlook.com -all
- wk4xh4p1h5qh8k156tmcwjtygrghjxyz
- 16glmn5w21rn7s3tcmsjylmv54sm2y2k
- spf2.0/pra,mfrom include:rhusaspf2.smtp.com ~all
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