Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cuatromastres.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-04 02:58:56 UTC · ↺ Refresh
MX Hostnames
- cuatromastres.com
MX Priorities
- cuatromastres.com: 0
A / AAAA Records
- 74.50.73.102 ↩ srv4.happywebserver.com
Mail Server IPs
- 74.50.73.102 ↩ srv4.happywebserver.com
SOA Record
Raw SOA
ns1.srv4.happywebserver.com tupihosting.gmail.com 2026040400 3600 1800 1209600 86400
Primary NS (mname)
ns1.srv4.happywebserver.com
Admin Email (rname)
tupihosting@gmail.com
Serial
2026040400
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns2.srv4.happywebserver.com
ns1.srv4.happywebserver.com
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:74.50.73.102 include:relay.mailbaby.net ip4:65.181.111.135 include:spf.mysecurecloudhost.com ip4:212.1.210.1 ip4:109.106.250.51 a mx ip4:212.1.215.34 include:relay.mailchannels.net ~all
📊 DNS lookups: 5/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
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 ip4:74.50.73.102 include:relay.mailbaby.net ip4:65.181.111.135 include:spf.mysecurecloudhost.com ip4:212.1.210.1 ip4:109.106.250.51 a mx ip4:212.1.215.34 include:relay.mailchannels.net ~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 cuatromastres.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits