Investigator Use
MailScrap (mailscrap.com) is an online email harvesting tool that extracts email addresses from websites by crawling a target URL and its linked pages to collect all publicly accessible email addresses. Investigators provide a domain or starting URL, and the tool systematically crawls the site to compile a list of discovered email addresses.
For OSINT investigators conducting corporate reconnaissance, MailScrap automates the tedious process of manually navigating a target organization's website to identify contact email addresses. A single crawl can surface email addresses from staff directories, contact pages, press releases, legal notices, and embedded form targets across an entire site.
Harvested email addresses serve as foundational intelligence for multiple subsequent investigative steps: identifying the email naming convention used by the organization (enabling systematic generation of additional addresses), providing pivot points for breach database lookups, supplying account identifiers for social media enumeration, and establishing contact infrastructure for the target organization.
For corporate intelligence investigations, email harvesting often reveals organizational structure beyond what public-facing pages explicitly document. Development environment emails, support system addresses, and internal tool contact addresses occasionally appear in public-facing content and can reveal technology choices, vendor relationships, or internal personnel that are not otherwise apparent.
When combined with email validation tools, harvested addresses can be filtered to active accounts — ensuring that investigative resources are focused on live, relevant contacts rather than outdated or deprecated addresses.
Limitations: MailScrap crawls visible page content and cannot access JavaScript-rendered content, authenticated areas, or dynamically generated email addresses. Organizations using contact forms or obfuscation techniques (emails displayed as images) will have reduced email visibility. Crawl depth and site complexity can affect completeness of results.
All email harvesting should be limited to publicly accessible content and conducted within applicable legal frameworks. Email addresses collected from websites are generally intended to be public but using them for unauthorized contact or spam violates both legal and ethical standards.
Record the target domain, crawl date, number of pages crawled, and full extracted email list in case documentation.
Before You Pivot
Record Context
Capture the target, search terms, and why this source is relevant before you leave the page.
Preserve Evidence
Archive volatile pages, save screenshots, and keep timestamps for anything that may change.
Corroborate
Treat one tool as a lead source. Confirm important findings with independent sources.
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