Production CLI script for automated MX/SMTP lead validation and context-aware LLM cold email personalization.

What’s included:

• Asynchronous DNS and MX record checking with direct SMTP handshake simulation to prevent hard bounces without triggering spam traps.
• Dynamic web extraction layer targeting prospect homepages, about pages, and recent blog posts to surface granular value propositions.
• Dual-pass LLM pipeline (compatible with OpenAI and local Ollama models) using strict JSON schemas to craft personalized first-lines.
• Rate-limited concurrent execution utilizing Python’s asyncio and aiohttp to process up to 500 leads per hour within safe API boundaries.