coreoutsource.com

Valid Email Server
Domain Lookup › coreoutsource.com

Domain Overview

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

Checked via [email protected] · 2026-04-03 15:15:24 UTC · ↺ Refresh

MX Hostnames

  • coreoutsource-com.mail.protection.outlook.com

MX Priorities

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

A / AAAA Records

  • 35.212.55.65 ↩ 65.55.212.35.bc.googleusercontent.com

Mail Server IPs

  • 52.101.42.16 ↩ mail-co1pr05cu00300.inbound.protection.outlook.com
  • 52.101.9.2 ↩ mail-mn2pr02cu00202.inbound.protection.outlook.com
  • 52.101.9.26 ↩ mail-bl0pr02cu00702.inbound.protection.outlook.com
  • 52.101.194.3 ↩ mail-ch1pr04cu00103.inbound.protection.outlook.com
  • 2a01:111:f403:f802::3 ↩ mail-sj0pr03cu01403.inbound.protection.outlook.com
  • 2a01:111:f403:f90d::1 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
  • 2a01:111:f403:c902::6 ↩ mail-sj0pr21cu00106.inbound.protection.outlook.com
  • 2a01:111:f403:c946::3 ↩ mail-ch0pr04cu00603.inbound.protection.outlook.com

SOA Record

Raw SOA ns39.worldnic.com namehost.worldnic.com 125070817 10800 3600 604800 3600
Primary NS (mname)
ns39.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
125070817
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s

Nameservers (NS)

ns39.worldnic.com
ns40.worldnic.com

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com ip4:50.62.177.35 ip4:184.168.200.142 -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

2 records
  • SPFv=spf1 include:spf.protection.outlook.com ip4:50.62.177.35 ip4:184.168.200.142 -all
  • google-site-verification=8wcTZJR_OI8YDbw2VQ25ru5RqbZRy8Eg1hGgmp5R3BE
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