Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cornerstone-group.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-29 10:28:39 UTC · ↺ Refresh
MX Hostnames
- cornerstonegroup-com02i.mail.protection.outlook.com
MX Priorities
- cornerstonegroup-com02i.mail.protection.outlook.com: 0
A / AAAA Records
- 35.227.91.86 ↩ 86.91.227.35.bc.googleusercontent.com
Mail Server IPs
- 52.101.137.0 ↩ mail-sg2pr03cu00500.inbound.protection.outlook.com
- 52.101.124.117 ↩ mail-tydpr03cu00105.inbound.protection.outlook.com
- 52.101.157.80 ↩ mail-os8pr02cu00100.inbound.protection.outlook.com
- 2a01:111:f403:cc09:: ↩ mail-sg2pr03cu00500.inbound.protection.outlook.com
- 2a01:111:f403:cc1f::4 ↩ mail-os8pr02cu00104.inbound.protection.outlook.com
- 2a01:111:f403:cc1a::8 ↩ mail-tydpr03cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
fred.ns.cloudflare.com dns.cloudflare.com 2399866835 10000 2400 604800 1800
Primary NS (mname)
fred.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399866835
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
zara.ns.cloudflare.com
fred.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:203.124.10.45 ip4:203.124.10.44 include:relay.mailchannels.net include:spf.dynect.net include:servers.mcsv.net include:clickbackspf.com include:3817022.spf08.hubspotemail.net include:spf.protection.outlook.com -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; pct=100; sp =reject; fo=1;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 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
3 records- MS=ms15584924
- MS=ms59700843
- SPFv=spf1 ip4:203.124.10.45 ip4:203.124.10.44 include:relay.mailchannels.net include:spf.dynect.net include:servers.mcsv.net include:clickbackspf.com include:3817022.spf08.hubspotemail.net include:spf.protection.outlook.com -all
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