Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
certus.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 01:38:15 UTC · ↺ Refresh
MX Hostnames
- certus-com.mail.protection.outlook.com
MX Priorities
- certus-com.mail.protection.outlook.com: 0
A / AAAA Records
- 89.106.200.197 (no PTR)
- 2a12:5240:1:c5::1 (no PTR)
Mail Server IPs
- 52.101.9.2 ↩ mail-mn2pr02cu00202.inbound.protection.outlook.com
- 52.101.50.1 ↩ mail-co1pr05cu00401.inbound.protection.outlook.com
- 52.101.41.22 ↩ mail-sj2pr05cu00406.inbound.protection.outlook.com
- 52.101.41.58 ↩ mail-sj0pr02cu00102.inbound.protection.outlook.com
- 2a01:111:f403:c927::1 ↩ mail-bn8pr05cu00301.inbound.protection.outlook.com
- 2a01:111:f403:f804::3 ↩ mail-co1pr03cu00403.inbound.protection.outlook.com
- 2a01:111:f403:c91d::a ↩ mail-co1pr21cu00202.inbound.protection.outlook.com
- 2a01:111:f403:c946::7 ↩ mail-ch5pr02cu00307.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1-01.azure-dns.com azuredns-hostmaster.microsoft.com 1 3600 300 2419200 300
Primary NS (mname)
ns1-01.azure-dns.com
Admin Email (rname)
azuredns-hostmaster@microsoft.com
Serial
1
Refresh
3600s
Retry
300s
Expire
2419200s
Minimum TTL
300s
Nameservers (NS)
ns3-01.azure-dns.org
ns4-01.azure-dns.info
ns1-01.azure-dns.com
ns2-01.azure-dns.net
SPF Record
✓ Strict (-all)
v=spf1 ip4:147.124.160.0/19 ip4:198.105.202.0/23 ip4:198.105.207.0/24 ip4:208.69.28.0/23 ip4:38.107.71.0/24 ip4:147.124.160.0/19 ip4:162.213.152.0/23 ip4:198.105.200.0/23 ip4:198.105.206.0/24 include:spf.protection.outlook.com include:sendgrid.net include:app.na5.teamsupport.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; pct=100; rua=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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
14 records- atlassian-domain-verification=rUS5u5Y6P2ihJNBrJMDkxXFJysuhwhBceWl1eSAXyGrqSP1oHcjrhIzSqea2pPmf
- google-site-verification=TJ8gV-2oK2X-8gl7HJOSyKKJFcWdWFewt-q7Issc324
- logmein-verification-code=b7d8c6b9-fa59-4f0d-bdf1-6eeed446a13c
- mlgk57t4n8wfb6l13v88tpymb9n7bpf4
- apple-domain-verification=9BujKW6iUtsdjKrC
- SPFv=spf1 ip4:147.124.160.0/19 ip4:198.105.202.0/23 ip4:198.105.207.0/24 ip4:208.69.28.0/23 ip4:38.107.71.0/24 ip4:147.124.160.0/19 ip4:162.213.152.0/23 ip4:198.105.200.0/23 ip4:198.105.206.0/24 include:spf.protection.outlook.com include:sendgrid.net include:app.na5.teamsupport.com -all
- openai-domain-verification=dv-0zeJoBooBc7EEK7xkXjAaBPx
- zoom
- knowbe4-site-verification=7c19a2c00ae9a1791d86741725105099
- slack-domain-verification=hyz6Hw6sNSHpyx5deCvOvR8cyOMdWM9r7Vj6H7j3
- anthropic-domain-verification-c7fzcb=1MApdWw4pfNI5Vf2zEKwmmz2Z
- DMARCv=DMARC1; p=none; pct=100; rua=mailto:[email protected]
- 1password-site-verification=FCAMLKSSWJADXC4F7ILWTMGHZY
- apple-domain-verification=p8qh1KOVu5C0LM59
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