Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
s3cuso.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-22 23:19:37 UTC · ↺ Refresh
MX Hostnames
- s3cuso-com.mail.protection.outlook.com
MX Priorities
- s3cuso-com.mail.protection.outlook.com: 0
A / AAAA Records
- 23.185.0.4 (no PTR)
- 2620:12a:8001::4 (no PTR)
- 2620:12a:8000::4
Mail Server IPs
- 52.101.41.22 ↩ mail-sj2pr05cu00406.inbound.protection.outlook.com
- 52.101.42.14 ↩ mail-mw2pr04cu00106.inbound.protection.outlook.com
- 52.101.41.21 ↩ mail-sj2pr05cu00305.inbound.protection.outlook.com
- 52.101.11.10 ↩ mail-sa9pr03cu00202.inbound.protection.outlook.com
- 2a01:111:f403:f90a::1 ↩ mail-bn8pr03cu00201.inbound.protection.outlook.com
- 2a01:111:f403:f90f::1 ↩ mail-sa9pr04cu00201.inbound.protection.outlook.com
- 2a01:111:f403:c931::1 ↩ mail-sa9pr03cu00201.inbound.protection.outlook.com
- 2a01:111:f403:c946::7 ↩ mail-ch5pr02cu00307.inbound.protection.outlook.com
SOA Record
Raw SOA
dns5.open-techs.com hostmaster.dns1.open-techs.com 2026021903 10800 3600 604800 1200
Primary NS (mname)
dns5.open-techs.com
Admin Email (rname)
hostmaster@dns1.open-techs.com
Serial
2026021903
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
1200s
Nameservers (NS)
dns6.open-techs.com
dns3.open-techs.com
dns5.open-techs.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:12.178.113.0/24 ip4:8.24.31.0/24 ip4:66.159.240.90 ip4:66.159.238.63 a:mailhosts.swbc.com include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1
✓ Reject — strongest protection
📋 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
9 records- MS=ms63594959
- _073d3ufofci8kw72j29e8hteedwibby
- ph8rcnqtdn3fn6xcsjq6dl9gg5jyjhdx
- _udi5pqb2p03dt16mvhxhds7328l1azg
- google-site-verification=LWSNuK9NGmIZ7NJiLpHJ7r4wWxzXHNEiYAKoZTImF_M
- SPFv=spf1 ip4:12.178.113.0/24 ip4:8.24.31.0/24 ip4:66.159.240.90 ip4:66.159.238.63 a:mailhosts.swbc.com include:spf.protection.outlook.com -all
- apple-domain-verification=1CXdsxrNxw1R3Brj
- ciscocidomainverification=437077930799a20f90ebae9dfabbf71a24f448b4be055b236a669df910a8c820
- yahoo-verification-key=gGd3zCOaGohR+jB/DwM1o9j7xQNoIf+xbuc9O4c2xQM=
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