sourcebuild.net

Valid Email Server
Domain Lookup › sourcebuild.net

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
sourcebuild.net
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-21 20:25:55 UTC · ↺ Refresh

MX Hostnames

  • sourcebuild-net.mail.protection.outlook.com

MX Priorities

  • sourcebuild-net.mail.protection.outlook.com: 0

A / AAAA Records

  • 191.101.104.114 (no PTR)
  • 154.41.250.211 (no PTR)
  • 2a02:4780:21:cee6:cfb6:6fbb:81c5:bb30
  • 2a02:4780:84:3ba:228c:4a81:c4dd:5a47
  • 2a02:4780:21:e05c:862:42ce:f145:857c

Mail Server IPs

  • 52.101.50.1 ↩ mail-co1pr05cu00401.inbound.protection.outlook.com
  • 52.101.41.0 ↩ mail-byapr05cu00400.inbound.protection.outlook.com
  • 52.101.9.11 ↩ mail-bl2pr04cu00103.inbound.protection.outlook.com
  • 52.101.10.14 ↩ mail-bn6pr04cu00206.inbound.protection.outlook.com
  • 2a01:111:f403:f907::1 ↩ mail-dm1pr04cu00201.inbound.protection.outlook.com
  • 2a01:111:f403:f90a:: ↩ mail-bn6pr02cu00300.inbound.protection.outlook.com
  • 2a01:111:f403:f908::2 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
  • 2a01:111:f403:c801:: ↩ mail-sa9pr02cu00200.inbound.protection.outlook.com

SOA Record

Raw SOA ns1.bdm.microsoftonline.com azuredns-hostmaster.microsoft.com 1 3600 300 2419200 300
Primary NS (mname)
ns1.bdm.microsoftonline.com
Admin Email (rname)
azuredns-hostmaster@microsoft.com
Serial
1
Refresh
3600s
Retry
300s
Expire
2419200s
Minimum TTL
300s

Nameservers (NS)

ns1.bdm.microsoftonline.com
ns2.bdm.microsoftonline.com
ns3.bdm.microsoftonline.com
ns4.bdm.microsoftonline.com

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

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

2 records
  • SPFv=spf1 include:spf.protection.outlook.com -all
  • mscid=3RY1GS7EfHCKsq5gu3bre/neVkcNVL/R0KwxXMCGZm1LWQk8B33eW5c7/o1FfBa1mUGh9i5IUf9z8k6H/9Dslw==
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