Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cbtu.gov.br
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-29 00:42:37 UTC · ↺ Refresh
MX Hostnames
- mail-1.cbtu.gov.br
- pop2.cbtu.gov.br
- antispam.cbtu.gov.br
- pop.cbtu.gov.br
MX Priorities
- antispam.cbtu.gov.br: 25
- mail-1.cbtu.gov.br: 15
- pop.cbtu.gov.br: 20
- pop2.cbtu.gov.br: 10
A / AAAA Records
- 200.252.98.183 ↩ cbtu.gov.br
- 186.200.39.177 ↩ cbtu.gov.br
Mail Server IPs
- 200.252.98.182 ↩ antispam.cbtu.gov.br
- 186.200.39.170 ↩ pop.cbtu.gov.br
- 200.252.98.181 ↩ pop2.cbtu.gov.br
- 186.200.39.169 ↩ pop2.cbtu.gov.br
SOA Record
Raw SOA
ns1.cbtu.gov.br suporte.cbtu.gov.br 2026032502 10800 3600 2419200 300
Primary NS (mname)
ns1.cbtu.gov.br
Admin Email (rname)
suporte@cbtu.gov.br
Serial
2026032502
Refresh
10800s
Retry
3600s
Expire
2419200s
Minimum TTL
300s
Nameservers (NS)
ns1.cbtu.gov.br
ns4.cbtu.gov.br
ns3.cbtu.gov.br
ns2.cbtu.gov.br
SPF Record
✓ Strict (-all)
v=spf1 mx include:_spf.google.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; pct=10; rua=mailto:[email protected]; adkim=r; aspf=s
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Strict
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
⚠ Policy applies to 10% of failing messages only
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 mx include:_spf.google.com -all
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