Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
smtk.co.kr
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-30 05:05:09 UTC · ↺ Refresh
MX Hostnames
- securemx01.mailplug.com
- securemx02.mailplug.com
MX Priorities
- securemx02.mailplug.com: 20
- securemx01.mailplug.com: 10
A / AAAA Records
- 203.245.44.111 (no PTR)
Mail Server IPs
- 223.26.214.11 ↩ securemx02.mailplug.com
- 223.26.214.12 ↩ securemx02.mailplug.com
- 121.156.118.237 ↩ securemx01.mailplug.com
- 121.156.118.242 ↩ securemx01.mailplug.com
- 121.156.118.230 ↩ securemx01.mailplug.com
SOA Record
Raw SOA
ns-1641.awsdns-13.co.uk awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1641.awsdns-13.co.uk
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-1028.awsdns-00.org
ns-1641.awsdns-13.co.uk
ns-213.awsdns-26.com
ns-955.awsdns-55.net
SPF Record
✓ Soft Fail (~all)
v=spf1 mx include:mailplug.com ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
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 mx include:mailplug.com ~all
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