Domain Overview
DNS: ✓ 1h ago
Checker: ✓ 1h ago
ctcb.mx
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-07-01 14:54:12 UTC · ↺ Refresh
MX Hostnames
- smtp.google.com
MX Priorities
- smtp.google.com: 1
A / AAAA Records
- 34.232.138.143 ↩ www3.nix.mx
Mail Server IPs
- 142.251.163.26 ↩ wv-in-f26.1e100.net
- 142.251.163.27 ↩ wv-in-f27.1e100.net
- 64.233.180.27 ↩ on-in-f27.1e100.net
- 173.194.45.27 ↩ yuiadum-in-f27.1e100.net
- 173.194.45.26 ↩ yuiadum-in-f26.1e100.net
- 2607:f8b0:4004:c21::1b ↩ pe-in-f27.1e100.net
- 2607:f8b0:4004:c29::1a ↩ yuiadum-in-f26.1e100.net
- 2607:f8b0:4004:c29::1b ↩ yuiadum-in-f27.1e100.net
- 2607:f8b0:4004:c1b::1b ↩ wv-in-f27.1e100.net
SOA Record
Raw SOA
ns1.nixnetworks.mx hostmaster.ctcb.mx 1781809981 16384 2048 1048576 2560
Primary NS (mname)
ns1.nixnetworks.mx
Admin Email (rname)
hostmaster@ctcb.mx
Serial
1781809981
Refresh
16384s
Retry
2048s
Expire
1048576s
Minimum TTL
2560s
Nameservers (NS)
ns1.nixnetworks.mx
ns2.nixnetworks.mx
ns3.nixnetworks.mx
SPF Record
✓ Strict (-all)
v=spf1 a mx include:_spf.google.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1;p=none;sp=none;aspf=r;adkim=r
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: none
DKIM Selectors
✓ 1 found
google._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- SPFv=spf1 a mx include:_spf.google.com -all
- google-site-verification=j48QOPcVLSY-JcdjaEAXWy0F81hAQCbOg8shUdpM4pQ
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