gradetec.com.br

Valid Email Server
Domain Lookup › gradetec.com.br

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
gradetec.com.br
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-24 03:13:17 UTC · ↺ Refresh

MX Hostnames

  • gradetec-com-br.mail.protection.outlook.com

MX Priorities

  • gradetec-com-br.mail.protection.outlook.com: 0

A / AAAA Records

  • 104.21.58.239 (no PTR)
  • 172.67.166.67 (no PTR)
  • 2606:4700:3035::ac43:a643
  • 2606:4700:3033::6815:3aef

Mail Server IPs

  • 52.101.194.13 ↩ mail-ch0pr04cu00605.inbound.protection.outlook.com
  • 52.101.11.2 ↩ mail-sn1pr03cu00102.inbound.protection.outlook.com
  • 52.101.11.17 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
  • 52.101.50.7 ↩ mail-co1pr21cu00207.inbound.protection.outlook.com
  • 2a01:111:f403:c902::4 ↩ mail-sj0pr03cu01504.inbound.protection.outlook.com
  • 2a01:111:f403:f902:: ↩ mail-bl2pr04cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:c92c::1 ↩ mail-dm6pr03cu00401.inbound.protection.outlook.com
  • 2a01:111:f403:c902::5 ↩ mail-sj2pr05cu00505.inbound.protection.outlook.com

SOA Record

Raw SOA dean.ns.cloudflare.com dns.cloudflare.com 2397583556 10000 2400 604800 1800
Primary NS (mname)
dean.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2397583556
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

gracie.ns.cloudflare.com
dean.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com +a:app.quint.com.br -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

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

DKIM Selectors

✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default

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

All TXT Records

2 records
  • google-site-verification=grPgX5wSFEBShgxyuK4f6Gk3ct2cxQiTkEB-sWr4glM
  • SPFv=spf1 include:spf.protection.outlook.com +a:app.quint.com.br -all
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