Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
dorsey.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-28 15:53:00 UTC · ↺ Refresh
MX Hostnames
- us-smtp-inbound-2.mimecast.com
- us-smtp-inbound-1.mimecast.com
MX Priorities
- us-smtp-inbound-2.mimecast.com: 10
- us-smtp-inbound-1.mimecast.com: 10
A / AAAA Records
- 23.100.43.208 (no PTR)
Mail Server IPs
- 170.10.128.221 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.132.242 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.132.141 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.242 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.132.221 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.128.141 ↩ us-smtp-inbound-1.mimecast.com
SOA Record
Raw SOA
ns1.dorsey.com internet-dns.dorsey.com 200409211 900 600 86400 3600
Primary NS (mname)
ns1.dorsey.com
Admin Email (rname)
internet-dns@dorsey.com
Serial
200409211
Refresh
900s
Retry
600s
Expire
86400s
Minimum TTL
3600s
Nameservers (NS)
ns1.dorsey.com
ns2.dorsey.com
ns3.dorsey.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:us._netblocks.mimecast.com include:spf-us.vx-email.com include:spf-outbound.smtp.dorsey.com include:everbridge.net include:spf.protection.outlook.com ~all
📊 DNS lookups: 5/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
k1._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
9 records- knowbe4-site-verification=ae9de314b04234b429be9afb50ba5f8e
- ZOOM_verify_quR6Fx5fQ5C_-unu4Hlhug
- intersight=b149772961d1c4ddb90107b91c1032c75d72eb7de13eca67fdfbbd36db20d080
- SPFv=spf1 include:us._netblocks.mimecast.com include:spf-us.vx-email.com include:spf-outbound.smtp.dorsey.com include:everbridge.net include:spf.protection.outlook.com ~all
- rV/XhuSf8kWumlGMWyLUWOolgmj75j5xv/ea3Vqj3PVvhZ1RZUKRmRxwqL8wRU8e0l7N+JoLwORU5XD4hm/c6g==
- twilio-domain-verification=d44e3b8972c086f477391cf0a2be33b4
- _l3niibsc2xycnu4z76jqt32h3diaybd
- MS=ms64061281
- ciscocidomainverification=5325d3f11acbf620afc8a27611bd9530a000489518b09e1d9a6bf4bf1ca14122
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