rubyacademy.com.br

Valid Email Server
Domain Lookup › rubyacademy.com.br
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
rubyacademy.com.br
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-05-20 21:19:05 UTC · ↺ Refresh

MX Hostnames

  • smtpsin1.f1.k8.com.br

MX Priorities

No priority data.

A / AAAA Records

  • 104.156.247.183
  • 108.61.89.136
  • 45.55.107.236
  • 2604:a880:400:d0::1a3d:e001
  • 2001:19f0:5:39fb:5400:4ff:fe7c:e4cc
  • 2001:19f0:9002:1b90:5400:4ff:fe7c:e525

Mail Server IPs

No IPs resolved.

SOA Record

No SOA record found.

Nameservers (NS)

nsb3.hostnet.com.br
nsb4.hostnet.com.br
nsb5.hostnet.com.br
nsb6.hostnet.com.br
nsb1.hostnet.com.br
nsb2.hostnet.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

3 records
  • google-site-verification=hCDQn-dRLGenBek7XNSNULy8RPMFkWJ0i1fnRYdjMjw
  • SPFv=spf1 a:mxs.f1.k8.com.br -all
  • google-site-verification: google67e31c29abe7be96.html
Full email verification for rubyacademy.com.br

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