Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rrbiusa.com
Yes
✓ Yes
Proofpoint
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-02 14:18:45 UTC · ↺ Refresh
MX Hostnames
- mxb-0027d001.gslb.pphosted.com
- mxa-0027d001.gslb.pphosted.com
- rrbiusa-com.mail.protection.outlook.com
MX Priorities
- mxb-0027d001.gslb.pphosted.com: 20
- rrbiusa-com.mail.protection.outlook.com: 5
- mxa-0027d001.gslb.pphosted.com: 10
A / AAAA Records
- 104.26.0.31 (no PTR)
- 172.67.75.107 (no PTR)
- 104.26.1.31
- 2606:4700:20::681a:1f
- 2606:4700:20::ac43:4b6b
- 2606:4700:20::681a:11f
Mail Server IPs
- 148.163.149.185 ↩ mx0a-0027d001.pphosted.com
- 52.101.137.0 ↩ mail-sg2pr03cu00500.inbound.protection.outlook.com
- 52.101.157.80 ↩ mail-os8pr02cu00100.inbound.protection.outlook.com
- 52.101.124.117 ↩ mail-tydpr03cu00105.inbound.protection.outlook.com
- 2a01:111:f403:cc09:: ↩ mail-sg2pr03cu00500.inbound.protection.outlook.com
- 2a01:111:f403:cc1f::4 ↩ mail-os8pr02cu00104.inbound.protection.outlook.com
- 2a01:111:f403:cc1a::8 ↩ mail-tydpr03cu00100.inbound.protection.outlook.com
- 148.163.152.117 ↩ mx0b-0027d001.pphosted.com
SOA Record
Raw SOA
dom.ns.cloudflare.com dns.cloudflare.com 2399515819 10000 2400 604800 1800
Primary NS (mname)
dom.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399515819
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
dom.ns.cloudflare.com
gail.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 a mx ip4:50.18.194.184 include:spf.protection.outlook.com mx:smtp.rrbiusa.com include:spfa.cpmails.com -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; adkim=r; 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
✓ 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
3 records- SPFv=spf1 a mx ip4:50.18.194.184 include:spf.protection.outlook.com mx:smtp.rrbiusa.com include:spfa.cpmails.com -all
- MS=ms66858133
- hes=ba327197f6cae36f2c9d6f0fda23b212
Full email verification for rrbiusa.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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