Domain Overview
DNS: ✓ 1mo ago
Checker: ✓ 1mo ago
tzinberg.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-06-30 10:10:11 UTC · ↺ Refresh
MX Hostnames
- us-smtp-inbound-1.mimecast.com
- us-smtp-inbound-2.mimecast.com
MX Priorities
- us-smtp-inbound-2.mimecast.com: 0
- us-smtp-inbound-1.mimecast.com: 0
A / AAAA Records
- 23.239.28.248 ↩ 23-239-28-248.ip.linodeusercontent.com
- 2600:3c00::f03c:94ff:fe22:1b00 (no PTR)
Mail Server IPs
- 170.10.132.242 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.132.141 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.141 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.132.221 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.128.242 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.221 ↩ us-smtp-inbound-1.mimecast.com
SOA Record
Raw SOA
ns67.worldnic.com namehost.worldnic.com 125071014 10800 3600 604800 3600
Primary NS (mname)
ns67.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
125071014
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns67.worldnic.com
ns68.worldnic.com
SPF Record
✓ Strict (-all)
v=spf1 a ip4:167.68.16.96 include:us._netblocks.mimecast.com include:spf.protection.outlook.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; 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
4 records- 0ed1fe018ac45e488c1d3f4ab99b6642e2a27fa641
- openai-domain-verification=dv-PAaKJT2MzOXtrA351Z2iciPO
- google-site-verification=7Wu2xKP2FswVXYIgkzRSNBvso1nA35ERpwyWC_aHua8
- SPFv=spf1 a ip4:167.68.16.96 include:us._netblocks.mimecast.com include:spf.protection.outlook.com -all
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