Domain Overview
DNS: ✓ 20d ago
Checker: ✓ 20d ago
rpmengineering.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-20 23:47:15 UTC · ↺ Refresh
MX Hostnames
- mail.jeffsys.net
MX Priorities
- mail.jeffsys.net: 10
A / AAAA Records
- 104.194.9.243 ↩ mail.jeffsys.net
Mail Server IPs
- 104.194.9.243 ↩ mail.jeffsys.net
SOA Record
Raw SOA
dns1.rpmengineering.com hostmaster.jeffsys.net 2025100501 1200 600 2419200 300
Primary NS (mname)
dns1.rpmengineering.com
Admin Email (rname)
hostmaster@jeffsys.net
Serial
2025100501
Refresh
1200s
Retry
600s
Expire
2419200s
Minimum TTL
300s
Nameservers (NS)
dns1.jeffsys.net
dns2.jeffsys.net
SPF Record
✓ Strict (-all)
v=spf1 a mx include:outbound.mailhop.org -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict 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:outbound.mailhop.org -all
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