HostSherlock
@hostsherlock.com
Check a domain's SPF, DKIM, DMARC, MTA-STS, MX certificates and blocklist status in one pass. Free, no signup, and it tells you which finding to fix first.
HostSherlock's Company Logos
HostSherlock's Brand Colors
Hex Code
Color name
RGB
HSL
CMYK
#0077C2
Lochmara
0, 119, 194
203, 100, 38
100, 39, 0, 24
#0E1015
Bunker
14, 16, 21
223, 20, 7
33, 24, 0, 92
#FFFFFF
White
255, 255, 255
0, 0, 100
0, 0, 0, 0
About HostSherlock
HostSherlock provides tools for checking domain security, email authentication, and deliverability. Its Domain Audit + Fix Guide scans a domain in about 60 seconds, assessing public DNS and mail settings across 17 signals, including SPF, DKIM, DMARC, MTA-STS, MX certificates, and blocklist status. Results distinguish confirmed issues from items that could not be measured and prioritize findings with practical guidance on what to address first.
The product range also includes daily impersonation monitoring for lookalike domains, DMARC monitoring, an API for developers, email verification, and bulk list cleaning. HostSherlock offers a Chrome extension for checking domains while browsing, with Email Guard listed as coming soon. Its free browser-based tools, which require no account, include email, MX, SPF, DMARC, DNS, host, and blacklist checks, as well as a public IP lookup. The company explains how its scoring works and connects checks to relevant technical standards and compliance considerations. Individual products can be used independently or bundled, with pricing and additional resources available through the site.
Brand industry
Computers Electronics and Technology
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