Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
mastertec.com
Yes
✓ Yes
Amazon SES
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-27 00:17:31 UTC · ↺ Refresh
MX Hostnames
- smtp.secureserver.net
- inbound-smtp.us-east-1.amazonaws.com
- mailstore1.secureserver.net
MX Priorities
- inbound-smtp.us-east-1.amazonaws.com: 10
- smtp.secureserver.net: 0
- mailstore1.secureserver.net: 10
A / AAAA Records
- 72.167.76.56
Mail Server IPs
- 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
- 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
- 44.206.9.87 ↩ ec2-44-206-9-87.compute-1.amazonaws.com
- 216.69.141.71 ↩ osplibsmtp01-v01.prod.phx3.secureserver.net
- 216.69.141.113 ↩ osplibsmtp03-v01.prod.phx3.secureserver.net
- 216.69.141.84 ↩ osplibsmtp02-v01.prod.phx3.secureserver.net
- 216.69.141.162 ↩ osplibsmtp02-v02.prod.phx3.secureserver.net
- 216.69.141.114 ↩ osplibsmtp03-v02.prod.phx3.secureserver.net
- 216.69.141.78
SOA Record
Raw SOA
ns01.domaincontrol.com dns.jomax.net 2024041902 28800 7200 604800 3600
Primary NS (mname)
ns01.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2024041902
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns02.domaincontrol.com
ns01.domaincontrol.com
SPF Record
✓ Strict (-all)
v=spf1 include:secureserver.net -all
📊 DNS lookups: 1/10
✓ 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 include:secureserver.net -all
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