Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
core-eng.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 20:57:42 UTC · ↺ Refresh
MX Hostnames
- us-smtp-inbound-1.mimecast.com
- us-smtp-inbound-2.mimecast.com
MX Priorities
- us-smtp-inbound-2.mimecast.com: 10
- us-smtp-inbound-1.mimecast.com: 10
A / AAAA Records
- 35.209.121.148 ↩ 148.121.209.35.bc.googleusercontent.com
Mail Server IPs
- 170.10.128.221 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.132.141 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.132.221 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.132.242 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.128.141 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.128.242 ↩ us-smtp-inbound-2.mimecast.com
SOA Record
Raw SOA
ns77.worldnic.com namehost.worldnic.com 126021616 10800 3600 604800 3600
Primary NS (mname)
ns77.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
126021616
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns77.worldnic.com
ns78.worldnic.com
SPF Record
✓ Strict (-all)
v=spf1 include:_netblocks.mimecast.com include:spf.protection.outlook.com include:zcsend.net -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; pct=100; sp=quarantine; fo=1;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
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
8 records- google-site-verification=zYvEx5sel2liS9SaDPeAogRz1-N-SjQyR7Q-ycIoz3I
- google-site-verification=oCeQO7CWjKcCBIcBnx-yz73j3iwEZSVzmvACVlxgkIw
- MS=ms23312358
- docusign=487b4ced-5d33-4e7c-b826-9f9b555a7bca
- google-site-verification=EAtHFb0HK7PSYBgN2n9--CxjIO9W0nlZOuyxuZUgjeM
- SPFv=spf1 include:_netblocks.mimecast.com include:spf.protection.outlook.com include:zcsend.net -all
- amazon-business-verification=ac09f4b81c80a84a2ced76d2d64c875da0b5b7cd87341d05abf3c4219ca9377f
- u0FiXhyxTtBf7UPn+luaE3ZyczTGDEejYw0563H0bf2DT5hYDBGmYd0vXLHgSI1MsKThstBslW1k/kS77vIr7Q==
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