Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rbc-utility.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 17:50:12 UTC · ↺ Refresh
MX Hostnames
- rbcutility-com0i.mail.protection.outlook.com
- d137658b.ess.barracudanetworks.invalid
- d137658a.ess.barracudanetworks.invalid
MX Priorities
- rbcutility-com0i.mail.protection.outlook.com: 0
- d137658b.ess.barracudanetworks.invalid: 20
- d137658a.ess.barracudanetworks.invalid: 30
A / AAAA Records
- 141.193.213.21 (no PTR)
- 141.193.213.20 (no PTR)
Mail Server IPs
- 52.101.41.180 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
- 52.101.11.7 ↩ mail-sa9pr04cu00107.inbound.protection.outlook.com
- 52.101.8.44 ↩ mail-dm5pr04cu00104.inbound.protection.outlook.com
- 52.101.194.15 ↩ mail-ch4pr21cu00107.inbound.protection.outlook.com
- 2a01:111:f403:f913:: ↩ mail-cy1pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c803:: ↩ mail-bn1pr21cu00200.inbound.protection.outlook.com
- 2a01:111:f403:f802:: ↩ mail-byapr05cu00400.inbound.protection.outlook.com
- 2a01:111:f403:c902::5 ↩ mail-sj2pr05cu00505.inbound.protection.outlook.com
SOA Record
Raw SOA
jo.ns.cloudflare.com dns.cloudflare.com 2398115535 10000 2400 604800 1800
Primary NS (mname)
jo.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398115535
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
jo.ns.cloudflare.com
ridge.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:_u.rbc-utility.com._spf.smart.ondmarc.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; sp=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; adkim=r; aspf=r; fo=1; rf=afrf; ri=3600
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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
5 records- MS=ms67593145
- anthropic-domain-verification-vgj2at=Dox34GnwdJkbBm0JyMTdBY5nU
- lucid-verification=ufg9enu1byr7jztPCK
- openai-domain-verification=dv-hdYD3P2onGBebGSgp0o01hnP
- SPFv=spf1 include:_u.rbc-utility.com._spf.smart.ondmarc.com -all
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