Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
mail21.cc
Disposable
✓ Yes
Amazon SES
⚠ Yes
Yes
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-14 02:26:50 UTC · ↺ Refresh
MX Hostnames
- inbound-smtp.us-east-1.amazonaws.com
MX Priorities
- inbound-smtp.us-east-1.amazonaws.com: 10
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 54.197.5.236 ↩ ec2-54-197-5-236.compute-1.amazonaws.com
- 44.210.166.32 ↩ ec2-44-210-166-32.compute-1.amazonaws.com
- 54.164.173.191 ↩ ec2-54-164-173-191.compute-1.amazonaws.com
- 3.211.210.226 ↩ ec2-3-211-210-226.compute-1.amazonaws.com
- 44.206.9.87 ↩ ec2-44-206-9-87.compute-1.amazonaws.com
SOA Record
Raw SOA
eric.ns.cloudflare.com dns.cloudflare.com 2397670469 10000 2400 604800 1800
Primary NS (mname)
eric.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2397670469
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
eric.ns.cloudflare.com
kay.ns.cloudflare.com
SPF Record
✗ Invalid
v=spf1 -all
📊 DNS lookups: 0/10
⚠ Strict -all with no allowed senders — no servers can send email for this domain.
DMARC Record
✓ Reject
v=DMARC1; p=reject; fo=1; ri=3600; rua=mailto:[email protected]; ruf=mailto:[email protected]
✓ 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
1 record- SPFv=spf1 -all
Full email verification for mail21.cc
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