Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cornerstoneak.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 23:38:29 UTC · ↺ Refresh
MX Hostnames
- mx1-us.emailsecurity.app
- mx2-us.emailsecurity.app
MX Priorities
- mx2-us.emailsecurity.app: 10
- mx1-us.emailsecurity.app: 0
A / AAAA Records
- 35.215.86.251 ↩ 251.86.215.35.bc.googleusercontent.com
Mail Server IPs
- 172.212.4.33 ↩ mx1-us.emailsecurity.app
- 40.121.188.167 ↩ mx1-us.emailsecurity.app
SOA Record
Raw SOA
ns1.siteground.net admins.siteground.com 130 10800 3600 1209600 3600
Primary NS (mname)
ns1.siteground.net
Admin Email (rname)
admins@siteground.com
Serial
130
Refresh
10800s
Retry
3600s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
ns2.siteground.net
ns1.siteground.net
SPF Record
✓ Strict (-all)
v=spf1 ip4:66.223.174.70 include:spf1.emailsecurity.app include:spf.protection.outlook.com include:spf.hornetsecurity.com include:email.pipelinesuite.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 3 found
default._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 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
2 records- MS=ms90830062
- SPFv=spf1 ip4:66.223.174.70 include:spf1.emailsecurity.app include:spf.protection.outlook.com include:spf.hornetsecurity.com include:email.pipelinesuite.com -all
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