Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cerc.inf.br
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-26 19:48:55 UTC · ↺ Refresh
MX Hostnames
- cerc-inf-br.mail.protection.outlook.com
MX Priorities
- cerc-inf-br.mail.protection.outlook.com: 0
A / AAAA Records
- 45.223.41.208 (no PTR)
- 45.223.47.208 (no PTR)
Mail Server IPs
- 52.101.42.16 ↩ mail-co1pr05cu00300.inbound.protection.outlook.com
- 40.93.192.4 ↩ mail-dm2pr04cu00404.inbound.protection.outlook.com
- 52.101.9.2 ↩ mail-mn2pr02cu00202.inbound.protection.outlook.com
- 52.101.10.10 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
- 2a01:111:f403:c92c::3 ↩ mail-dm5pr04cu00103.inbound.protection.outlook.com
- 2a01:111:f403:f90f::1 ↩ mail-sa9pr04cu00201.inbound.protection.outlook.com
- 2a01:111:f403:c927::1 ↩ mail-bn8pr05cu00301.inbound.protection.outlook.com
- 2a01:111:f403:c91d::a ↩ mail-co1pr21cu00202.inbound.protection.outlook.com
SOA Record
Raw SOA
ns-1588.awsdns-06.co.uk awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1588.awsdns-06.co.uk
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-145.awsdns-18.com
ns-1588.awsdns-06.co.uk
ns-626.awsdns-14.net
ns-1404.awsdns-47.org
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.localservices.com.br include:_spf.google.com include:mail.zendesk.com include:24344861.spf03.hubspotemail.net include:spf.protection.outlook.com -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=reject; ruf=mailto:[email protected]; rua=mailto:[email protected]; fo=1
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject
DKIM Selectors
✓ 5 found
selector1._domainkey
selector2._domainkey
k1._domainkey
s1._domainkey
s2._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
18 records- twilio-domain-verification=5048088e5f2a59b76e9bdfb011e074c6
- atlassian-domain-verification=Cyut53fBwvTWSlvNAjt5Vc24gk5wQvmhsUwj/DlVPrlQiRYshvgcQbp/t209UHLG
- MS=ms93197645
- google-site-verification=TYjBI4d8CEDRwc88_rfencfeBNcQQ8MjXZCE_VJGw0k
- MS=ms19389857
- google-site-verification=1Kj0wC2IQUaQvnM24sEP8keIolenx7RGEPKgXzpdirM
- firebase=cerc2-cad-prd-01
- MS=ms95233714
- knowbe4-site-verification=c5143a3102df239a83bb24d10c030360
- SPFv=spf1 include:_spf.localservices.com.br include:_spf.google.com include:mail.zendesk.com include:24344861.spf03.hubspotemail.net include:spf.protection.outlook.com -all
- google-site-verification=y18erhwNKtjZgkKODB5yFi-fAMN3RZu5EmJCsMYjCVA
- google-site-verification=XEG60cVM82dkSwnksHY-pLK_Pnsa_xyKdVP2m5TxZsg
- _globalsign-domain-verification=d_0s9wP6SqsahNTjX5bL8OoHhfyieDOAlZ5DMT7oFi
- google-site-verification=H-66Eu6k6dWOdR8tOAXvCNXz-GFak1D_sQU2hHSoKaA
- anthropic-domain-verification-k0my39=GQc5UnLptpteabZMDGOrTp8t4
- google-site-verification=ObtFEpzke59Fqvn7YBu-wWnN6832Xwc7PKfXWqLJBQE
- 6fvs4qpar4uut9g9lvoln88o3s
- firebase=cerc2-cad-int-01
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