Domain Overview
DNS: ✓ 1d ago
Checker: ✓ 1d ago
usinaalcon.com.br
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-20 03:12:35 UTC · ↺ Refresh
MX Hostnames
- mx-vip-02.uni5.net
- mx-vip-01.uni5.net
MX Priorities
- mx-vip-01.uni5.net: 5
- mx-vip-02.uni5.net: 5
A / AAAA Records
- 191.6.210.240 ↩ web2152.uni5.net
- 64.4.48.208 ↩ ns2-208.azure-dns.net
- 2804:10:8002::210:240 ↩ web2152.uni5.net
Mail Server IPs
- 191.6.220.38 ↩ mx-vip-01-farm28.uni5.net
- 2804:10:8028::220:38 ↩ mx-vip-01-farm28.uni5.net
- 191.6.220.39 ↩ mx-vip-02-farm28.uni5.net
- 2804:10:8028::220:39 ↩ mx-vip-02-farm28.uni5.net
SOA Record
Raw SOA
dns1.linharesonline.net.br abuse.uni5.net 2601260601 86400 14400 604800 3600
Primary NS (mname)
dns1.linharesonline.net.br
Admin Email (rname)
abuse@uni5.net
Serial
2601260601
Refresh
86400s
Retry
14400s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
dns4.linharesonline.net.br
dns3.linharesonline.net.br
dns2.linharesonline.net.br
dns1.linharesonline.net.br
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.uni5.net -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 1 found
mail._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: mail
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- MS=E10B8B846ACB2EC6F9FE46DF3DF080FA910F9FD0
- SPFv=spf1 include:_spf.uni5.net -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 usinaalcon.com.br
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits