Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
sierra.com.br
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-29 04:43:22 UTC · ↺ Refresh
MX Hostnames
- mx.sierra.com.br
MX Priorities
- mx.sierra.com.br: 10
A / AAAA Records
- 187.103.247.2 ↩ 187-103-247-2.adyl.net.br
- 23.236.62.147 ↩ 147.62.236.23.bc.googleusercontent.com
Mail Server IPs
- 187.85.164.112 ↩ reverso.sierra.com.br
SOA Record
Raw SOA
ns1.sierra.com.br hostmaster.sierra.com.br 2026032202 7200 3600 1209600 3600
Primary NS (mname)
ns1.sierra.com.br
Admin Email (rname)
hostmaster@sierra.com.br
Serial
2026032202
Refresh
7200s
Retry
3600s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
ns1.sierra.com.br
dns.seti.com.br
SPF Record
✓ Strict (-all)
v=spf1 ip4:187.85.164.112 ip4:200.174.56.40 ip4:45.163.72.150 ip4:187.115.52.238/32 ip4:179.127.167.141/32 -all
📊 DNS lookups: 0/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected]; ri=86400
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 3 found
default._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- google-site-verification=oOObWpmpO_KJniePeZsQq7D1KocVi4-3BmSs9h3bXWM
- SPFv=spf1 ip4:187.85.164.112 ip4:200.174.56.40 ip4:45.163.72.150 ip4:187.115.52.238/32 ip4:179.127.167.141/32 -all
Full email verification for sierra.com.br
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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