Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
on-coursemarketing.com
Yes
✓ Yes
Yahoo
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 13:51:24 UTC · ↺ Refresh
MX Hostnames
- mx-biz.mail.am0.yahoodns.net
MX Priorities
- mx-biz.mail.am0.yahoodns.net: 0
A / AAAA Records
- 192.185.92.145 ↩ 192-185-92-145.unifiedlayer.com
Mail Server IPs
- 67.195.204.83 ↩ mtaproxy1.biz.mail.vip.bf1.yahoo.com
- 67.195.228.75 ↩ mtaproxy1.biz.mail.vip.gq1.yahoo.com
SOA Record
Raw SOA
ns481.websitewelcome.com dnsadmin.impulse.websitewelcome.com 2026012401 86400 7200 3600000 86400
Primary NS (mname)
ns481.websitewelcome.com
Admin Email (rname)
dnsadmin@impulse.websitewelcome.com
Serial
2026012401
Refresh
86400s
Retry
7200s
Expire
3600000s
Minimum TTL
86400s
Nameservers (NS)
ns481.websitewelcome.com
ns482.websitewelcome.com
SPF Record
✓ Soft Fail (~all)
v=spf1 a mx include:websitewelcome.com ~all
📊 DNS lookups: 3/10
~ 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 a mx include:websitewelcome.com ~all
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