Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
gbsys.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 23:36:22 UTC · ↺ Refresh
MX Hostnames
- gbsys-com.mail.protection.outlook.com
MX Priorities
- gbsys-com.mail.protection.outlook.com: 0
A / AAAA Records
- 3.13.252.134 ↩ ec2-3-13-252-134.us-east-2.compute.amazonaws.com
Mail Server IPs
- 52.101.41.180 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
- 52.101.42.16 ↩ mail-co1pr05cu00300.inbound.protection.outlook.com
- 52.101.9.17 (no PTR)
- 52.101.41.4 ↩ mail-sj2pr05cu00204.inbound.protection.outlook.com
- 2a01:111:f403:c946::4 ↩ mail-ch0pr04cu00504.inbound.protection.outlook.com
- 2a01:111:f403:c902::2 ↩ mail-sj0pr03cu01602.inbound.protection.outlook.com
- 2a01:111:f403:c903::3 ↩ mail-mw2pr02cu00503.inbound.protection.outlook.com
- 2a01:111:f403:f901::2 ↩ mail-bl2pr02cu00402.inbound.protection.outlook.com
SOA Record
Raw SOA
ns-2046.awsdns-63.co.uk awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-2046.awsdns-63.co.uk
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-1049.awsdns-03.org
ns-2046.awsdns-63.co.uk
ns-205.awsdns-25.com
ns-837.awsdns-40.net
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:8990505.spf07.hubspotemail.net -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1;p=none;sp=none;pct=100;rua=mailto:[email protected];ruf=mailto:[email protected];ri=86400;aspf=s;adkim=s;fo=1
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 1 found
google._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: google
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:8990505.spf07.hubspotemail.net -all
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