corelab.com

Valid Email Server
Domain Lookup › corelab.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
corelab.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-25 21:56:07 UTC · ↺ Refresh

MX Hostnames

  • mailgw1.corelab.com
  • mailgw2.corelab.com
  • mailgw3.corelab.com

MX Priorities

  • mailgw2.corelab.com: 10
  • mailgw3.corelab.com: 20
  • mailgw1.corelab.com: 10

A / AAAA Records

  • 141.193.213.10 (no PTR)
  • 141.193.213.11 (no PTR)

Mail Server IPs

  • 20.153.214.8 ↩ mailgw2.corelab.com
  • 20.33.72.22 ↩ mailgw3.corelab.com
  • 20.153.212.13 ↩ mailgw1.corelab.com

SOA Record

Raw SOA ns1.corelab.com hostmaster.corelab.com 2018010100 3600 1800 2419200 300
Primary NS (mname)
ns1.corelab.com
Admin Email (rname)
hostmaster@corelab.com
Serial
2018010100
Refresh
3600s
Retry
1800s
Expire
2419200s
Minimum TTL
300s

Nameservers (NS)

ns4.corelab.com
ns1.corelab.com
ns2.corelab.com
ns3.corelab.com

SPF Record

✓ Strict (-all)
v=spf1 include:_corelab1.corelab.com include:spf.protection.outlook.com include:_spf.salesforce.com include:spf.boardbooks.com include:spf.afas.online include:spf.mandrillapp.com include:spf.flowmailer.net -all
📊 DNS lookups: 7/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

~ Quarantine
v=DMARC1;p=quarantine;pct=100;rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

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

11 records
  • nintex.66337410284331881949fa07
  • SPFv=spf1 include:_corelab1.corelab.com include:spf.protection.outlook.com include:_spf.salesforce.com include:spf.boardbooks.com include:spf.afas.online include:spf.mandrillapp.com include:spf.flowmailer.net -all
  • cisco-ci-domain-verification=1b36601888af9f6d4010ec2840cf82c9f7f9bdff0f190e2f1a90abd5a0de3e20
  • fbdt985cry5mp0t57vvd73h5xrct4c71
  • apple-domain-verification=xGvFgGmeXJDlUp8q
  • v=easydus; cg=400982ff-b811-4056-8fb2-ccee85e43ddc
  • teamviewer-sso-verification=0915ac80615c4154bb62711a4287198c
  • vmware-cloud-verification-5a9ade53-cf17-4373-acce-d3440cde4361
  • securid-domain-verification=I4Ggb7rbu70g5B8
  • google-gws-recovery-domain-verification=67330576
  • google-site-verification=kfxiJmVRAnqRWdhPegw-I5tElEWEls5CnWP-JvdBLu0
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