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Email investigation tool that checks mail servers, DNS records, and delivery details for a given address.

Email search tool for finding public addresses and related information during OSINT investigations.

Hunter tool for verifying if an email address is valid, deliverable, and safe to use before outreach.

Browser tool guide for checking whether an email address is linked to visible Facebook results.

Reverse email lookup tool for finding public profiles, social accounts, and identity clues linked to an email address.

Browser extension guide for finding LinkedIn profiles connected to an email address.

German email and productivity service with ad-free mail, aliases, encrypted transport and storage, and optional office, drive, and meeting tools.

Belgian email service with browser-based OpenPGP encryption, digital signatures, aliases, custom domains, calendars, and documents.

Public breach-awareness service for checking whether an email address appears in known data breaches.

Mozilla service that checks email addresses against known breaches and explains protective steps.

Cybernews checker for seeing whether an email or phone appears in known data leaks.

Command-line tool for checking which known breaches may be linked to a target email address.

Investigative reporting archive focused on dark-web markets, breaches and underground actors.

Open source email alias service for creating disposable forwarding addresses and protecting inbox privacy.

AnonymMail.net helps create email aliases or forwarding addresses to protect your real inbox.

Email finding and verification service for discovering business email addresses and checking deliverability.

Caspio search page for finding Cal Poly-related email records or directory information.

Can I Email? is a developer resource for coding, documentation, communities, security research, or software tools.

MXToolbox tool for analyzing email headers, tracing message routes, and spotting delivery or authentication issues.

Email Privacy Tester is a privacy tool for blocking ads, trackers, popups, proxies, or unwanted web behavior.

OSINT platform for reverse email and phone lookups, helping investigators find public account links and digital traces.

WikiLeaks archive for searching emails and documents from the Macron campaign leak.

OpenPGP Email Encryption is a privacy tool for blocking ads, trackers, popups, proxies, or unwanted web behavior.

Independent, ad-free email, calendar, and address-book service based in Germany, with privacy-focused account and encryption options.