cyberriver.com

Valid Email Server
Domain Lookup › cyberriver.com

Domain Overview

DNS: ✓ 12h ago Checker: ✓ 12h ago
cyberriver.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-07-02 05:58:25 UTC · ↺ Refresh

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MX Hostnames

  • mail.cyberriver.com

MX Priorities

  • mail.cyberriver.com: 0

A / AAAA Records

  • 104.21.13.229 (no PTR)
  • 172.67.133.103 (no PTR)
  • 2606:4700:3036::ac43:8567 (no PTR)
  • 2606:4700:3031::6815:de5 (no PTR)

Mail Server IPs

  • 207.244.230.235 ↩ s22.cyberriver.com

SOA Record

Raw SOA alec.ns.cloudflare.com dns.cloudflare.com 2406789794 10000 2400 604800 1800
Primary NS (mname)
alec.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2406789794
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

alec.ns.cloudflare.com
hattie.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 +mx +a +mx:s22.cyberriver.com +ip4:207.244.230.235 -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1;p=reject;sp=none;adkim=r;aspf=r;pct=100;fo=0;rf=afrf;ri=86400;rua=mailto:[email protected];ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none

DKIM Selectors

✓ 1 found
default._domainkey
✓ Public key: 392 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=5NV5EHjqwmNEecu9jCZYyJrXxOy_W_WLXsek6IulF8s
  • SPFv=spf1 +mx +a +mx:s22.cyberriver.com +ip4:207.244.230.235 -all
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