Domain Overview
DNS: ✓ just now
Checker: ✓ just now
cdmformacion.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-21 07:24:44 UTC · ↺ Refresh
MX Hostnames
- mail.cdmformacion.com
MX Priorities
- mail.cdmformacion.com: 10
A / AAAA Records
- 82.223.25.87 ↩ mx1.mail.grupocdm.es
Mail Server IPs
- 82.223.25.87 ↩ mx1.mail.grupocdm.es
SOA Record
Raw SOA
dns7.servidoresdns.net hostmaster.servidoresdns.net 2020102228 21600 3600 2419200 60
Primary NS (mname)
dns7.servidoresdns.net
Admin Email (rname)
hostmaster@servidoresdns.net
Serial
2020102228
Refresh
21600s
Retry
3600s
Expire
2419200s
Minimum TTL
60s
Nameservers (NS)
dns8.servidoresdns.net
dns7.servidoresdns.net
SPF Record
✓ Strict (-all)
v=spf1 ip4:82.223.25.87 a:mx1.mail.grupocdm.es -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; adkim=r; aspf=r; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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
1 record- SPFv=spf1 ip4:82.223.25.87 a:mx1.mail.grupocdm.es -all
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for cdmformacion.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits