Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
gstsinc.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 19:02:38 UTC · ↺ Refresh
MX Hostnames
- gstsinc-com.mail.protection.outlook.com
MX Priorities
- gstsinc-com.mail.protection.outlook.com: 0
A / AAAA Records
- 198.207.148.169 ↩ 198-207-148-169.ayera.net
Mail Server IPs
- 52.101.8.46 ↩ mail-dm6pr05cu00406.inbound.protection.outlook.com
- 52.101.10.8 ↩ mail-bn1pr04cu00100.inbound.protection.outlook.com
- 52.101.11.17 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
- 52.101.194.4 ↩ mail-ch4pr04cu00104.inbound.protection.outlook.com
- 2a01:111:f403:c902::14 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
- 2a01:111:f403:c946::4 ↩ mail-ch0pr04cu00504.inbound.protection.outlook.com
- 2a01:111:f403:f910:: ↩ mail-cy5pr03cu00300.inbound.protection.outlook.com
- 2a01:111:f403:c91d::b ↩ mail-mw2pr02cu00603.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.hostek.com hostmaster.gstsinc.com 201442500 43200 3600 604800 86400
Primary NS (mname)
ns1.hostek.com
Admin Email (rname)
hostmaster@gstsinc.com
Serial
201442500
Refresh
43200s
Retry
3600s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
ns1.hostek.com
ns2.hostek.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
2 records- MS=ms76606162
- SPFv=spf1 include:spf.protection.outlook.com -all
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