sys21.com.mx

No Valid Email Server
Domain Lookup › sys21.com.mx

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
sys21.com.mx
No
None
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-29 12:55:02 UTC · ↺ Refresh

MX Hostnames

No MX records found.

MX Priorities

No priority data.

A / AAAA Records

  • 128.199.6.153 ↩ server.sys21.com.mx

Mail Server IPs

No IPs resolved.

SOA Record

Raw SOA ns1.digitalocean.com hostmaster.sys21.com.mx 1736883907 10800 3600 604800 1800
Primary NS (mname)
ns1.digitalocean.com
Admin Email (rname)
hostmaster@sys21.com.mx
Serial
1736883907
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

ns2.digitalocean.com
ns3.digitalocean.com
ns1.digitalocean.com

SPF Record

✗ Missing

No SPF record — domain is unprotected against spoofing.

⚠ No SPF record found. Email servers cannot verify authorized senders.

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✓ 2 found
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: s1

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

No TXT records found.

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