I need all publicly available customer-facing email addresses extracted from a list of e-commerce websites that I will supply once the project begins. Please crawl only the domains I provide, respect robots.txt where possible, and avoid triggering any rate limits or security blocks—rotating proxies or headless browsing with tools such as Python, Scrapy, BeautifulSoup, Selenium, or similar is fine as long as the result is reliable. Deliverable • One clean, de-duplicated CSV file containing the harvested email addresses, ready for direct import into my CRM. Acceptance criteria • Every email must originate from the target e-commerce domains. • No duplicates, placeholders, or obviously invalid addresses. • File encodes as UTF-8 and opens without warnings in Excel/Google Sheets. Let me know the approximate turnaround time and a brief outline of the approach you prefer so I can green-light the scrape and share the site list.