Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
a3si.com.br
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-24 04:46:19 UTC · ↺ Refresh
MX Hostnames
- mx.jk.locaweb.com.br
- mx.core.locaweb.com.br
- mx.b.locaweb.com.br
- mx.a.locaweb.com.br
MX Priorities
- mx.a.locaweb.com.br: 20
- mx.b.locaweb.com.br: 20
- mx.core.locaweb.com.br: 10
- mx.jk.locaweb.com.br: 20
A / AAAA Records
- 191.6.210.140 ↩ varnish02-farm2.uni5.net
- 2804:10:8002::210:140 ↩ firebird52-farm2.uni5.net
Mail Server IPs
- 186.202.4.42 ↩ mx.a.locaweb.com.br
- 177.153.23.242 ↩ mx.b.locaweb.com.br
- 177.153.23.241 ↩ mx.core.locaweb.com.br
- 200.234.204.130 ↩ mx.jk.locaweb.com.br
SOA Record
Raw SOA
dns1.ondatta.com.br abuse.uni5.net 2603230905 86400 14400 604800 3600
Primary NS (mname)
dns1.ondatta.com.br
Admin Email (rname)
abuse@uni5.net
Serial
2603230905
Refresh
86400s
Retry
14400s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
dns4.ondatta.com.br
dns3.ondatta.com.br
dns1.ondatta.com.br
dns2.ondatta.com.br
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.locaweb.com.br -all
📊 DNS lookups: 1/10
✓ 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
✓ 2 found
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: s1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- SPFv=spf1 include:_spf.locaweb.com.br -all
- google-site-verification=xBWILZXEScBkY3QsksFbt_ERUd48PMFdeUX8e3bA27A
Full email verification for a3si.com.br
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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