Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rb-construction.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 11:29:01 UTC · ↺ Refresh
MX Hostnames
- rbconstruction-com0e.mail.protection.outlook.com
MX Priorities
- rbconstruction-com0e.mail.protection.outlook.com: 0
A / AAAA Records
- 104.21.23.191 (no PTR)
- 172.67.212.235 (no PTR)
- 2606:4700:3031::6815:17bf
- 2606:4700:3031::ac43:d4eb
Mail Server IPs
- 52.101.194.13 ↩ mail-ch0pr04cu00605.inbound.protection.outlook.com
- 52.101.10.6 ↩ mail-bn1pr21cu00106.inbound.protection.outlook.com
- 52.101.11.13 ↩ mail-sn1pr0501cu00205.inbound.protection.outlook.com
- 52.101.40.2 ↩ mail-cy1pr05cu00402.inbound.protection.outlook.com
- 2a01:111:f403:c803:: ↩ mail-bn1pr21cu00200.inbound.protection.outlook.com
- 2a01:111:f403:f804::3 ↩ mail-co1pr03cu00403.inbound.protection.outlook.com
- 2a01:111:f403:f902:: ↩ mail-bl2pr04cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c802:: ↩ mail-cy4pr03cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
felipe.ns.cloudflare.com dns.cloudflare.com 2398734532 10000 2400 604800 1800
Primary NS (mname)
felipe.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398734532
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
maya.ns.cloudflare.com
felipe.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:nnfdu13db9.powerspf.com ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; pct=100; fo=1;
~ 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- sophos-domain-verification=206d10551950ea22e7323ad2964e6d60b2f4e655
- SPFv=spf1 include:nnfdu13db9.powerspf.com ~all
- v=verifydomain MS=2111054
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