derbyllc.com

Valid Email Server
Domain Lookup › derbyllc.com

Domain Overview

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

Checked via [email protected] · 2026-03-30 04:56:05 UTC · ↺ Refresh

MX Hostnames

  • derbyllc-com.mail.protection.outlook.com

MX Priorities

  • derbyllc-com.mail.protection.outlook.com: 10

A / AAAA Records

  • 18.233.214.102 ↩ ec2-18-233-214-102.compute-1.amazonaws.com
  • 52.70.41.126 ↩ ec2-52-70-41-126.compute-1.amazonaws.com

Mail Server IPs

  • 52.101.41.0 ↩ mail-byapr05cu00400.inbound.protection.outlook.com
  • 52.101.9.17 (no PTR)
  • 52.101.42.18 ↩ mail-co1pr03cu00302.inbound.protection.outlook.com
  • 52.101.11.15 ↩ mail-sa9pr02cu00207.inbound.protection.outlook.com
  • 2a01:111:f403:f903:: (no PTR)
  • 2a01:111:f403:f802::1 ↩ mail-sj2pr05cu00101.inbound.protection.outlook.com
  • 2a01:111:f403:c931::1 ↩ mail-sa9pr03cu00201.inbound.protection.outlook.com
  • 2a01:111:f403:c902::16 ↩ mail-byapr04cu00306.inbound.protection.outlook.com

SOA Record

Raw SOA ns1-34.azure-dns.com support.peak10.com 2019041754 28800 7200 604800 10800
Primary NS (mname)
ns1-34.azure-dns.com
Admin Email (rname)
support@peak10.com
Serial
2019041754
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
10800s

Nameservers (NS)

ns2-34.azure-dns.net
ns3-34.azure-dns.org
ns4-34.azure-dns.info
ns1-34.azure-dns.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:206.196.3.180 include:spf.protection.outlook.com include:zcsend.net include:mailgun.org -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

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

DKIM Selectors

✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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

4 records
  • openai-domain-verification=dv-LN8Fn2beBzfNh52pJV3axq49
  • google-site-verification=W-1jwvgZdYR6vIw6fvfoVZKKau4lYST_5c06uATE-4A
  • SPFv=spf1 ip4:206.196.3.180 include:spf.protection.outlook.com include:zcsend.net include:mailgun.org -all
  • google-site-verification=KkOPWnZnpAfQEx0KEbNaAgmj4FHk1BHFmlgsC3WvKCo
Full email verification for derbyllc.com

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

SPF / DKIM / DMARC Get 1,000 Free Credits