SeznamEmailProxy
Seznam webmail email image proxy service
About this crawler
SeznamEmailProxy is a web crawler identified by the regular-expression pattern SeznamEmailProxy in the User-Agent request header. It is categorised as social-preview. Use the regex above to detect, log, allow, or block SeznamEmailProxy traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
No block-rate data for this crawler.
Technical details
- Name
- SeznamEmailProxy
- Pattern
SeznamEmailProxy- Tags
- social-preview
- Reference
- https://o-seznam.cz/napoveda/email/mohlo-by-se-hodit/postovni-programy-a-aplikace/
- Added
- 2026/05/02
- rDNS suffixes
.seznam.cz- Instances
- 1 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely SeznamEmailProxy with forward-confirmed reverse DNS: the client IP's PTR record must end in one of the suffixes below and a forward A/AAAA lookup of that hostname must return the same IP. UA strings alone are spoofable; FCrDNS is not.
.seznam.cz
Sample User-Agent strings
Mozilla/5.0 SeznamEmailProxy/2.0.174
Block this crawler
robots.txt — disallow SeznamEmailProxy:
User-agent: SeznamEmailProxy
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} SeznamEmailProxy [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "SeznamEmailProxy") {
return 403;
}
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