corebiz.com.br

Valid Email Server
Domain Lookup › corebiz.com.br

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
corebiz.com.br
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-29 06:46:50 UTC · ↺ Refresh

MX Hostnames

  • aspmx.l.google.com
  • mx.core.locaweb.com.br
  • mx.jk.locaweb.com.br
  • alt4.aspmx.l.google.com
  • mx.a.locaweb.com.br
  • alt2.aspmx.l.google.com
  • alt3.aspmx.l.google.com
  • mx.b.locaweb.com.br
  • alt1.aspmx.l.google.com

MX Priorities

  • mx.a.locaweb.com.br: 20
  • mx.b.locaweb.com.br: 20
  • mx.jk.locaweb.com.br: 20
  • alt1.aspmx.l.google.com: 5
  • alt2.aspmx.l.google.com: 5
  • aspmx.l.google.com: 1
  • alt3.aspmx.l.google.com: 10
  • alt4.aspmx.l.google.com: 10
  • mx.core.locaweb.com.br: 10

A / AAAA Records

  • 104.21.65.163 (no PTR)
  • 172.67.147.40 (no PTR)
  • 2606:4700:3033::ac43:9328 (no PTR)
  • 2606:4700:3035::6815:41a3

Mail Server IPs

  • 186.202.4.42 ↩ mx.a.locaweb.com.br
  • 177.153.23.242 ↩ mx.b.locaweb.com.br
  • 200.234.204.130 ↩ mx.jk.locaweb.com.br
  • 108.177.123.26 ↩ lcscld-in-f26.1e100.net
  • 2800:3f0:4003:c0f::1a (no PTR)
  • 172.253.116.26 ↩ dj-in-f26.1e100.net
  • 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net

SOA Record

Raw SOA matt.ns.cloudflare.com dns.cloudflare.com 2399130998 10000 2400 604800 1800
Primary NS (mname)
matt.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399130998
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

matt.ns.cloudflare.com
sue.ns.cloudflare.com

SPF Record

✓ Soft Fail (~all)
v=spf1 include:_spf.locaweb.com.br ?all
📊 DNS lookups: 1/10
? Neutral (?all) — no enforcement

DMARC Record

✗ Missing

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

DKIM Selectors

✓ 3 found
k1._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: k1

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

6 records
  • MS=9F2AA74005381D29E20BA3350B46E9AAB0B6396F
  • atlassian-domain-verification=FmKM2t+kBOEwBPnSNYfXWk+gvIUeoP5HL2NW96qrP4JWEidMXEvIZHBlo+-r0ciF
  • atlassian-domain-verification=ri0m9LKoIBY0QloBGexloGZ84NLs4Pzkzsih8SMWfPSn7QGMuOMJ0VTPglp+y64R
  • ca3-fa93dd83b410460d835799199c5b3ba9
  • SPFv=spf1 include:_spf.locaweb.com.br ?all
  • SPFv=spf1 include:servers.mcsv.net ?all
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