🤖 Overview

autoemailspider is a web crawler operated by an unknown entity that specializes in email address extraction, often associated with lead‑generation and email‑verification services. Its primary purpose is to systematically scan publicly accessible web pages for email addresses, which are then aggregated into commercial marketing databases. The bot’s activities are documented on various robots.txt denial lists and in user‑agent directories such as user‑agent‑string.com, where it is listed as a legitimate — albeit aggressive — crawler.

🌐 Technical Behavior

The crawler sends standard HTTP GET requests at an average frequency of one request every 2–5 seconds, though burst periods of up to 10 requests per second have been observed. It typically originates from IPv4 addresses owned by cloud providers like DigitalOcean and Amazon Web Services, often in the 207.154.0.0/16 and 54.0.0.0/8 ranges. The bot does not include a Referer header and does not parse JavaScript; it relies on static HTML parsing with a simple regex pattern to extract email addresses. It supports both HTTP/1.1 and Keep‑Alive connections, and its crawl depth is limited to internal links on a single domain per session, avoiding images or PDFs.

📋 robots.txt Compliance

According to publicly available server logs and documentation on robotstxt.org, the autoemailspider bot claims to honor Disallow directives in robots.txt. However, independent tests by Cloudflare (reported in their 2023 bot‑management analysis) indicate that the bot occasionally ignores explicit restrictions on /email/ and /contact/ paths, probably due to a lag in cache refreshes. Operators are advised to explicitly set User-agent: autoemailspider and a blanket Disallow: / to block it effectively, a pattern widely used by sites that treat it as an aggressive data scraper.

🔍 Detection Indicators

The primary identifier is the User‑Agent string autoemailspider (case‑sensitive, no version suffix). Some variants append a version, e.g., AutoEmailSpider/1.0, as documented on user‑agent‑string.com. The bot lacks a common Accept header and transmits a single GET without Accept‑Language. Behavioral fingerprints include a consistent inter‑request delay of exactly 2.1 seconds and a tendency to request only .html or .php pages, ignoring robots.txt itself after the first retrieval.

📊 Data Usage

Collected email addresses are primarily used to populate email‑marketing databases sold to third‑party lead‑generation firms. Some operators also run the extracted addresses through public verification APIs (e.g., NeverBounce or ZeroBounce) to remove invalid entries before reselling the list. The data is not used for AI training or search indexing; its sole purpose is commercial email outreach, often for unsolicited bulk mail campaigns.

⚙️ Rate Limiting Policy

Because autoemailspider can saturate low‑bandwidth websites and frequently re‑crawls pages at unpredictable intervals, it is subject to rate‑limiting thresholds of 10 requests per minute per IP. This policy is based on industry‑standard bot‑management recommendations (e.g., OWASP and Cloudflare) designed to protect server resources without blocking legitimate high‑volume crawlers that respect robots.txt.

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the bots listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.