Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
shieldair.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-26 23:27:38 UTC · ↺ Refresh
MX Hostnames
- mx1-us.emailsecurity.app
- mx2-us.emailsecurity.app
MX Priorities
- mx2-us.emailsecurity.app: 20
- mx1-us.emailsecurity.app: 10
A / AAAA Records
- 104.21.65.253 (no PTR)
- 172.67.196.80 (no PTR)
- 2606:4700:3032::6815:41fd (no PTR)
- 2606:4700:3032::ac43:c450 (no PTR)
Mail Server IPs
- 172.212.4.33 ↩ mx1-us.emailsecurity.app
- 40.121.188.167 ↩ mx1-us.emailsecurity.app
SOA Record
Raw SOA
kenneth.ns.cloudflare.com dns.cloudflare.com 2396924142 10000 2400 604800 1800
Primary NS (mname)
kenneth.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2396924142
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
kenneth.ns.cloudflare.com
kira.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:include:spf1.emailsecurity.app -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; sp=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1; aspf=s; adkim=s
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject
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
1 record- SPFv=spf1 include:spf.protection.outlook.com include:include:spf1.emailsecurity.app -all
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