Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
f13.com.br
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-04-04 11:38:00 UTC · ↺ Refresh
MX Hostnames
- mail01.f13.com.br
MX Priorities
- mail01.f13.com.br: 5
A / AAAA Records
- 128.201.87.98 (no PTR)
Mail Server IPs
- 204.199.59.100 ↩ mta01.f13.com.br
SOA Record
Raw SOA
batcaverna.f13.com.br hostmaster.f13.com.br 2026031601 3600 7200 1296000 43200
Primary NS (mname)
batcaverna.f13.com.br
Admin Email (rname)
hostmaster@f13.com.br
Serial
2026031601
Refresh
3600s
Retry
7200s
Expire
1296000s
Minimum TTL
43200s
Nameservers (NS)
ns3.f13.com.br
batcaverna.f13.com.br
ns4.f13.com.br
SPF Record
✓ Strict (-all)
v=spf1 a mx a:mail01.f13.com.br a:mail01.colab.f13.com.br a:mta03.f13.com.br ip4:200.186.254.100 ip4:200.186.254.127 ip4:204.199.59.100 ip4:204.199.59.101 -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]
⚠ 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
2 records- SPFv=spf1 a mx a:mail01.f13.com.br a:mail01.colab.f13.com.br a:mta03.f13.com.br ip4:200.186.254.100 ip4:200.186.254.127 ip4:204.199.59.100 ip4:204.199.59.101 -all
- facebook-domain-verification=84aotwg0xbzr5dptfdvpcd5mz0p5sy
Full email verification for f13.com.br
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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