Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
institutosc.com.br
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-04 12:28:51 UTC · ↺ Refresh
MX Hostnames
- mx.core.locaweb.com.br
- mx.jk.locaweb.com.br
- mx.b.locaweb.com.br
- mx.a.locaweb.com.br
MX Priorities
- mx.jk.locaweb.com.br: 20
- mx.core.locaweb.com.br: 10
- mx.a.locaweb.com.br: 20
- mx.b.locaweb.com.br: 20
A / AAAA Records
- 134.65.253.90 (no PTR)
Mail Server IPs
- 200.234.204.130 ↩ mx.jk.locaweb.com.br
- 177.153.23.241 ↩ mx.core.locaweb.com.br
- 186.202.4.42 ↩ mx.a.locaweb.com.br
- 177.153.23.242 ↩ mx.b.locaweb.com.br
SOA Record
Raw SOA
ns-131.awsdns-16.com awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-131.awsdns-16.com
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-2030.awsdns-61.co.uk
ns-946.awsdns-54.net
ns-131.awsdns-16.com
ns-1506.awsdns-60.org
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.locaweb.com.br ?all +include:amazonses.com -all +include:spf.oracleemaildelivery.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; pct=100; fo=1
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 include:_spf.locaweb.com.br ?all +include:amazonses.com -all +include:spf.oracleemaildelivery.com -all
Full email verification for institutosc.com.br
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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