Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rwtc.mx
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-31 07:19:24 UTC · ↺ Refresh
MX Hostnames
- mailstore1.secureserver.net
- smtp.secureserver.net
MX Priorities
- smtp.secureserver.net: 0
- mailstore1.secureserver.net: 10
A / AAAA Records
- 172.67.195.108 (no PTR)
- 104.21.92.159 (no PTR)
- 2606:4700:3037::ac43:c36c (no PTR)
- 2606:4700:3035::6815:5c9f (no PTR)
Mail Server IPs
- 216.69.141.113 ↩ osplibsmtp03-v01.prod.phx3.secureserver.net
- 216.69.141.84 ↩ osplibsmtp02-v01.prod.phx3.secureserver.net
- 216.69.141.71 ↩ osplibsmtp01-v01.prod.phx3.secureserver.net
- 216.69.141.78 ↩ osplibsmtp01-v02.prod.phx3.secureserver.net
- 216.69.141.162 ↩ osplibsmtp02-v02.prod.phx3.secureserver.net
- 216.69.141.114 ↩ osplibsmtp03-v02.prod.phx3.secureserver.net
SOA Record
Raw SOA
irma.ns.cloudflare.com dns.cloudflare.com 2399017900 10000 2400 604800 1800
Primary NS (mname)
irma.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399017900
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
zod.ns.cloudflare.com
irma.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:secureserver.net -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; adkim=r; aspf=r;
✓ Reject — strongest protection
📋 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 include:secureserver.net -all
- D8852185
Full email verification for rwtc.mx
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits