stdconst.com

Valid Email Server
Domain Lookup › stdconst.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
stdconst.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-28 13:45:45 UTC · ↺ Refresh

MX Hostnames

  • stdconst-com.mail.protection.outlook.com

MX Priorities

  • stdconst-com.mail.protection.outlook.com: 0

A / AAAA Records

  • 198.49.23.144 (no PTR)
  • 198.49.23.145 (no PTR)
  • 198.185.159.144
  • 198.185.159.145

Mail Server IPs

  • 52.101.10.12 ↩ mail-bn1pr21cu00204.inbound.protection.outlook.com
  • 52.101.41.0 ↩ mail-byapr05cu00400.inbound.protection.outlook.com
  • 52.101.41.21 ↩ mail-sj2pr05cu00305.inbound.protection.outlook.com
  • 52.101.11.9 ↩ mail-sn1pr02cu00101.inbound.protection.outlook.com
  • 2a01:111:f403:f913::1 ↩ mail-cy5pr05cu00101.inbound.protection.outlook.com
  • 2a01:111:f403:c946::7 ↩ mail-ch5pr02cu00307.inbound.protection.outlook.com
  • 2a01:111:f403:c91d::a ↩ mail-co1pr21cu00202.inbound.protection.outlook.com
  • 2a01:111:f403:f90d::1 ↩ mail-sn1pr0501cu00301.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)

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

9 records
  • MS=85A7E3003492D64415FD1192A95323937F001721
  • 943r90t01bmnhm7b8168r6vpw8kjlz4l
  • fw86qllj8ry92k6414ldkq491svj29lz
  • 6bh4ndnvn523l293d2lfbzr4wgwcf23f
  • 0fkl2xzbvp1nsmk3q00r4jmx75hxpjbz
  • mscid=s1dO2yRPlAGXW1ricP+PkZXdZsRZmlP1z/5cFG3l9/A9eFfYopNfrqswMGZXkU0DzcXGYvYrJUVRv+mTNh3QSA==
  • SPFv=spf1 include:spf.protection.outlook.com -all
  • MS=ms53657137
  • MS=099407910D6C0697052433A18D4F65794AEC839D
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