Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
ctctech.com.br
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 19:43:11 UTC · ↺ Refresh
MX Hostnames
- ctctech-com-br.mail.protection.outlook.com
MX Priorities
- ctctech-com-br.mail.protection.outlook.com: 0
A / AAAA Records
- 162.241.203.170 ↩ 162-241-203-170.unifiedlayer.com
Mail Server IPs
- 52.101.41.22 ↩ mail-sj2pr05cu00406.inbound.protection.outlook.com
- 52.101.11.19 ↩ mail-sa9pr04cu00203.inbound.protection.outlook.com
- 52.101.194.4 ↩ mail-ch4pr04cu00104.inbound.protection.outlook.com
- 52.101.40.2 ↩ mail-cy1pr05cu00402.inbound.protection.outlook.com
- 2a01:111:f403:f908::2 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
- 2a01:111:f403:f90a::1 ↩ mail-bn8pr03cu00201.inbound.protection.outlook.com
- 2a01:111:f403:c801:: ↩ mail-sa9pr02cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c92c::1 ↩ mail-dm6pr03cu00401.inbound.protection.outlook.com
SOA Record
Raw SOA
ns-1450.awsdns-53.org awsdns-hostmaster.amazon.com 2025060901 7200 900 1209600 86400
Primary NS (mname)
ns-1450.awsdns-53.org
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
2025060901
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-138.awsdns-17.com
ns-1450.awsdns-53.org
ns-1569.awsdns-04.co.uk
ns-536.awsdns-03.net
SPF Record
✓ Strict (-all)
v=spf1 include:spf.skymail.net.br include:spf.protection.outlook.com include:_spf.rdstation.com.br include:sendgrid.net -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; rf=afrf; pct=100
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: s1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 include:spf.skymail.net.br include:spf.protection.outlook.com include:_spf.rdstation.com.br include:sendgrid.net -all
Full email verification for ctctech.com.br
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