Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
guarantyins.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 11:24:36 UTC · ↺ Refresh
MX Hostnames
- us-smtp-inbound-1.mimecast.com
- us-smtp-inbound-2.mimecast.com
MX Priorities
- us-smtp-inbound-2.mimecast.com: 15
- us-smtp-inbound-1.mimecast.com: 15
A / AAAA Records
- 104.21.47.156 (no PTR)
- 172.67.148.222 (no PTR)
- 2606:4700:3031::6815:2f9c (no PTR)
- 2606:4700:3030::ac43:94de (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
- 170.10.128.221 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.128.242 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.141 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.132.221 ↩ us-smtp-inbound-1.mimecast.com
SOA Record
Raw SOA
quincy.ns.cloudflare.com dns.cloudflare.com 2397827372 10000 2400 604800 1800
Primary NS (mname)
quincy.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2397827372
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
quincy.ns.cloudflare.com
sky.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:us._netblocks.mimecast.com include:et._spf.pardot.com include:_spf.salesforce.com include:_spf.mycoionline.com include:guarantyins-com.spf.smtp25.com -all
📊 DNS lookups: 5/10
✓ 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
2 records- SPFv=spf1 include:us._netblocks.mimecast.com include:et._spf.pardot.com include:_spf.salesforce.com include:_spf.mycoionline.com include:guarantyins-com.spf.smtp25.com -all
- MS=ms19108478
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