Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
coresource.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-30 05:06:22 UTC · ↺ Refresh
MX Hostnames
- coresource-com.mail.protection.outlook.com
MX Priorities
- coresource-com.mail.protection.outlook.com: 10
A / AAAA Records
- 12.235.233.34 (no PTR)
Mail Server IPs
- 52.101.9.21 ↩ mail-bl2pr04cu00205.inbound.protection.outlook.com
- 52.101.9.11 ↩ mail-bl2pr04cu00103.inbound.protection.outlook.com
- 52.101.41.58 ↩ mail-sj0pr02cu00102.inbound.protection.outlook.com
- 52.101.8.42 ↩ mail-dm6pr03cu00402.inbound.protection.outlook.com
- 2a01:111:f403:f802::2 ↩ mail-sj2pr05cu00202.inbound.protection.outlook.com
- 2a01:111:f403:f913::1 ↩ mail-cy5pr05cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f905::4 ↩ mail-dm2pr04cu00404.inbound.protection.outlook.com
- 2a01:111:f403:f903:: (no PTR)
SOA Record
Raw SOA
ns93.worldnic.com namehost.worldnic.com 126032800 10800 3600 604800 3600
Primary NS (mname)
ns93.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
126032800
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns94.worldnic.com
ns93.worldnic.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:64.236.208.65 ip4:130.131.60.143 include:spf.protection.outlook.com include:spf.mandrillapp.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;rua=mailto:[email protected],mailto:[email protected];ruf=mailto:[email protected],mailto:[email protected]; fo=1
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
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
3 records- MS=ms82714678
- SPFv=spf1 ip4:64.236.208.65 ip4:130.131.60.143 include:spf.protection.outlook.com include:spf.mandrillapp.com -all
- MS=ms64030386
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