Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
domhelder.edu.br
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-27 08:21:50 UTC · ↺ Refresh
MX Hostnames
- domhelder-edu-br.mail.protection.outlook.com
MX Priorities
- domhelder-edu-br.mail.protection.outlook.com: 0
A / AAAA Records
- 172.66.146.33 (no PTR)
- 104.20.46.111 (no PTR)
- 2606:4700:10::ac42:9221
- 2606:4700:10::6814:2e6f
Mail Server IPs
- 52.101.40.6 ↩ mail-cy1pr03cu00106.inbound.protection.outlook.com
- 52.101.50.1 ↩ mail-co1pr05cu00401.inbound.protection.outlook.com
- 52.101.10.16 ↩ mail-bn6pr21cu00500.inbound.protection.outlook.com
- 52.101.40.0 ↩ mail-cy5pr03cu00300.inbound.protection.outlook.com
- 2a01:111:f403:c902:: ↩ mail-sj2pr05cu00300.inbound.protection.outlook.com
- 2a01:111:f403:f804::2 ↩ mail-co1pr05cu00402.inbound.protection.outlook.com
- 2a01:111:f403:c92c::4 ↩ mail-dm6pr05cu00404.inbound.protection.outlook.com
- 2a01:111:f403:c922::1 ↩ mail-bl0pr05cu00501.inbound.protection.outlook.com
SOA Record
Raw SOA
lennon.ns.cloudflare.com dns.cloudflare.com 2399176170 10000 2400 604800 1800
Primary NS (mname)
lennon.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399176170
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
lennon.ns.cloudflare.com
raphaela.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:_spf.elasticemail.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;rua=mailto:[email protected];pct=100;ruf=mailto:[email protected];fo=0:d:s;aspf=r;adkim=r;
~ Quarantine — good protection (failing mail goes to spam)
📋 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
6 records- google-site-verification=iDsbz_T3B0q2z90mjimMaejdkR4IAE2B1DdzW0HZZ8Y
- google-site-verification=n8bDCA46paJn9uce55fOVJ9vWLTq-_BO7d3Kwai0ULE
- google-site-verification=oZOzh0Ak4UT5gV9AyiquBsh_4HAxHVqYnreXnA-oYKA
- SPFv=spf1 include:spf.protection.outlook.com include:_spf.elasticemail.com -all
- XTY229GOBXQJXKG8KIUIAVGRTV0DAKP2Q1OQGC8R
- google-site-verification=79OWK9rbN27H0S2wlYuZKHxemtWwIGHoGd5C9-rzRRU
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