Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
estacio.com.br
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-24 08:22:44 UTC · ↺ Refresh
MX Hostnames
- estacio-com-br.mail.protection.outlook.com
MX Priorities
- estacio-com-br.mail.protection.outlook.com: 0
A / AAAA Records
- 54.145.27.224 ↩ ec2-54-145-27-224.compute-1.amazonaws.com
- 23.22.110.178 ↩ ec2-23-22-110-178.compute-1.amazonaws.com
Mail Server IPs
- 52.101.41.26 ↩ mail-sj0pr03cu01702.inbound.protection.outlook.com
- 52.101.42.16 ↩ mail-co1pr05cu00300.inbound.protection.outlook.com
- 52.101.41.183 ↩ mail-byapr04cu00307.inbound.protection.outlook.com
- 52.101.40.1 ↩ mail-cy4pr03cu00101.inbound.protection.outlook.com
SOA Record
Raw SOA
ns-1757.awsdns-27.co.uk awsdns-hostmaster.amazon.com 2022032601 7200 900 1209600 86400
Primary NS (mname)
ns-1757.awsdns-27.co.uk
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
2022032601
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-1527.awsdns-62.org
ns-1757.awsdns-27.co.uk
ns-637.awsdns-15.net
ns-148.awsdns-18.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
2 records- MS=ms87820206
- SPFv=spf1 include:spf.protection.outlook.com -all
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