Online blacklist checker built at bazter.pro/tools/blacklist/ that queries RBL and URIBL databases to identify email reputation issues for domains and IP addresses before mail delivery starts failing. Project Scope: - RBL (DNS-based blocklist) lookup for IP addresses - URIBL (URI blocklist) lookup for domains - Batch check across major blacklist providers - Clear listing status with per-provider breakdown Architecture: - Next.js frontend with React and TypeScript - PHP backend for DNS-based blacklist queries - Lightweight static delivery through Nginx and Cloudflare Results: - Fast email reputation audit without third-party dashboards - Practical for postmasters, hosting providers, and DevOps teams - Integrated into the BAZTER PRO online toolset
