istdp.com

Valid Email Server
Domain Lookup › istdp.com

Domain Overview

DNS: ✓ 12h ago Checker: ✓ 12h ago
istdp.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-05-20 09:53:24 UTC · ↺ Refresh

MX Hostnames

  • istdp-com.mail.protection.outlook.com

MX Priorities

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

A / AAAA Records

  • 162.159.134.42 (no PTR)
  • 162.159.135.42 (no PTR)
  • 2606:4700:7::a29f:872a
  • 2606:4700:7::a29f:862a

Mail Server IPs

  • 52.101.8.44 ↩ mail-dm5pr04cu00104.inbound.protection.outlook.com
  • 52.101.11.7 ↩ mail-sa9pr04cu00107.inbound.protection.outlook.com
  • 52.101.41.56 ↩ mail-sj0pr21cu00100.inbound.protection.outlook.com
  • 52.101.41.0 ↩ mail-byapr05cu00400.inbound.protection.outlook.com
  • 2a01:111:f403:f908::2 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
  • 2a01:111:f403:c946::6 ↩ mail-ch5pr02cu00406.inbound.protection.outlook.com
  • 2a01:111:f403:f90a::1 ↩ mail-bn8pr03cu00201.inbound.protection.outlook.com
  • 2a01:111:f403:f901::1 ↩ mail-bl0pr02cu00601.inbound.protection.outlook.com

SOA Record

Raw SOA curt.ns.cloudflare.com dns.cloudflare.com 2403703772 10000 2400 604800 1800
Primary NS (mname)
curt.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2403703772
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

kia.ns.cloudflare.com
curt.ns.cloudflare.com

SPF Record

✓ Soft Fail (~all)
v=spf1 include:spf.protection.outlook.com include:sendgrid.net include:mailgun.org ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ Missing

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

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

2 records
  • MS=ms29002666
  • SPFv=spf1 include:spf.protection.outlook.com include:sendgrid.net include:mailgun.org ~all
Full email verification for istdp.com

Run SMTP check, SPF/DKIM/DMARC and catch-all detection.

SPF / DKIM / DMARC Get 1,000 Free Credits