Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
mayflygwr.com.br
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-20 13:30:16 UTC · ↺ Refresh
MX Hostnames
- smtpsin1.f1.k8.com.br
MX Priorities
- smtpsin1.f1.k8.com.br: 10
A / AAAA Records
- 45.55.107.236 (no PTR)
- 104.156.247.183 ↩ 104.156.247.183.vultrusercontent.com
- 108.61.89.136 ↩ 108.61.89.136.vultrusercontent.com
Mail Server IPs
- 187.73.32.142 ↩ smtpsin1.f1.k8.com.br
SOA Record
Raw SOA
nsb1.k8.com.br dnsmasters.k8.com.br 37 3600 300 604800 3600
Primary NS (mname)
nsb1.k8.com.br
Admin Email (rname)
dnsmasters@k8.com.br
Serial
37
Refresh
3600s
Retry
300s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
nsb2.k8.com.br
nsb3.k8.com.br
nsb4.k8.com.br
nsb5.k8.com.br
nsb6.k8.com.br
nsb1.k8.com.br
SPF Record
✓ Strict (-all)
v=spf1 a:mxs.f1.k8.com.br -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 1 found
default._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
1 record- SPFv=spf1 a:mxs.f1.k8.com.br -all
Full email verification for mayflygwr.com.br
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