indexo.dev

lefsetz.com

.com crawl

First seen 2026-04-30 · Last seen 2026-04-30 · ok HTTP/1.1 200 2299 ms crawled 2026-05-08

US · 192.124.249.57 · AS30148 Sucuri

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title
Lefsetz Letter
Description
Lefsetz addresses the issues that are at the core of the music business: downloading, copy protection, pricing and the music itself.

Technology

Server
Sucuri

Third-party hosts loaded (1)

  • twitter-badges.s3.amazonaws.com×1

Social

Contact

Email

Registration

Registrar
NameCheap, Inc.
Created
2000-11-23
Expires
2027-11-23 553 days left
Updated
2025-10-27
Name servers
  • ns1.carbonlogic.com
  • ns3.carbonlogic.com

DNS records live

NS
  • ns1.carbonlogic.com
  • ns2.carbonlogic.com
  • ns3.carbonlogic.com
  • ns5.carbonlogic.com
  • ns6.carbonlogic.com
MX
  • 10 lefsetz.com.mx1.fusemail.net
  • 20 lefsetz.com.mx2.fusemail.net
  • 30 lefsetz.com.mx3.fusemail.net

Email authentication weak

SPF
v=spf1 mx include:_spf.carbonlogic.com ~all
softfail (~all)
DMARC
not published
DKIM
  • default: v=DKIM1;t=s;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzPDaH6qxdzu6CbzU5dYuHEfXlrAsSBg5hwE0m1tmle44V8oQ04R/aiFnsRpai7+nKz9Bva4HC5GPOACgkh…
selectors probed

Certificate (current)

Starfield Secure Certificate Authority - G2
from 2026-03-23 to 2026-06-21
Expires in 33 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 70/100 Checked live page: https://lefsetz.com/

present
  • content-security-policy
  • x-frame-options
  • x-content-type-options
findings
  • missing HSTS
  • missing Referrer Policy
  • missing Permissions Policy
Header values
x-frame-options
SAMEORIGIN
x-content-type-options
nosniff
content-security-policy
upgrade-insecure-requests;

Links to (1)

Linked from (1)