Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
coresecure.com
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-27 23:31:17 UTC · ↺ Refresh
MX Hostnames
- alt3.aspmx.l.google.com
- aspmx.l.google.com
- alt2.aspmx.l.google.com
- alt4.aspmx.l.google.com
- alt1.aspmx.l.google.com
MX Priorities
- alt3.aspmx.l.google.com: 10
- alt4.aspmx.l.google.com: 10
- alt1.aspmx.l.google.com: 5
- alt2.aspmx.l.google.com: 5
- aspmx.l.google.com: 1
A / AAAA Records
- 76.76.21.21
Mail Server IPs
- 192.178.223.27 ↩ yulhrs-in-f27.1e100.net
- 2a00:1450:4009:c0f::1a ↩ yulhrs-in-f26.1e100.net
- 173.194.76.27 ↩ ws-in-f27.1e100.net
- 2a00:1450:400c:c00::1a ↩ ws-in-x1a.1e100.net
- 108.177.123.26 ↩ lcscld-in-f26.1e100.net
- 2800:3f0:4003:c0f::1a (no PTR)
- 172.253.116.27 ↩ dj-in-f27.1e100.net
- 2a00:1450:400b:c02::1a ↩ dj-in-f26.1e100.net
- 172.253.63.26 ↩ bi-in-f26.1e100.net
- 2607:f8b0:4004:c1d::1a ↩ ww-in-f26.1e100.net
SOA Record
Raw SOA
ns1.coresecure.net hostmaster.coresecure.com 1 7200 900 1209600 86400
Primary NS (mname)
ns1.coresecure.net
Admin Email (rname)
hostmaster@coresecure.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns2.coresecure.info
ns3.coresecure.co.uk
ns4.coresecure.com
ns1.coresecure.net
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.google.com include:registrarmail.net -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 2 found
google._domainkey
selector1._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
6 records- google-site-verification=KQTqML52W_ukBtW-GTO7_f4ChsyOhbFAkZ1FPzXxlZI
- google-site-verification=OQ-kNUvII_fGv-AoGbVqiacMAdZn0RqmtSClRwSvks8
- SPFv=spf1 include:_spf.google.com include:registrarmail.net -all
- MS=9E6473A91A2753A44C7511E58542E28513131604
- apple-domain-verification=WPJbSpHsNBYDr3zr
- domain-verification=b09762e73b9b0a97c93275908afc6fd000fc572979bfcb63b8f1b171cd29c9e6
Full email verification for coresecure.com
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