Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
tcdobrasil.com.br
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-20 17:23:49 UTC · ↺ Refresh
MX Hostnames
- tcdobrasil-com-br.mail.protection.outlook.com
MX Priorities
- tcdobrasil-com-br.mail.protection.outlook.com: 0
A / AAAA Records
- 104.21.2.171 (no PTR)
- 172.67.129.123 (no PTR)
- 2606:4700:3035::ac43:817b
- 2606:4700:3031::6815:2ab
Mail Server IPs
- 52.101.50.1 ↩ mail-co1pr05cu00401.inbound.protection.outlook.com
- 52.101.50.7 ↩ mail-co1pr21cu00207.inbound.protection.outlook.com
- 52.101.50.10 ↩ mail-mw2pr02cu00502.inbound.protection.outlook.com
- 52.101.8.34 ↩ mail-dm2pr04cu00102.inbound.protection.outlook.com
- 2a01:111:f403:c92c::3 ↩ mail-dm5pr04cu00103.inbound.protection.outlook.com
- 2a01:111:f403:f90f::1 ↩ mail-sa9pr04cu00201.inbound.protection.outlook.com
- 2a01:111:f403:f90a:: ↩ mail-bn6pr02cu00300.inbound.protection.outlook.com
- 2a01:111:f403:c91d:: ↩ mail-mw2pr04cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
fiona.ns.cloudflare.com dns.cloudflare.com 2398741215 10000 2400 604800 1800
Primary NS (mname)
fiona.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398741215
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
ian.ns.cloudflare.com
fiona.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:_spf.emailmkt.correio.ws -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 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
4 records- SPFv=spf1 include:spf.protection.outlook.com include:_spf.emailmkt.correio.ws -all
- SPFv=spf1 include:spf.protection.outlook.com include:sender.zohobooks.com include:_spf.emailmkt.correio.ws -all
- ca3-ae99198b911a432ab80c5d7943fd5122
- google-site-verification=5q9Qp23w6YN--P_i3tvqmCv8TVu2_ZcepaOMGZjH7yw v=spf1 include:spf.protection.outlook.com include:sender.zohobooks.com -all
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for tcdobrasil.com.br
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits