HackUs Mail Access Checker is described as being capable of searching for emails "in almost every email provider" and includes features such as Hotmail checking, proxyless checking, and inbox searching.
: The tool logs into multiple email accounts sequentially using protocols like IMAP, POP3, or web interfaces. HackUs Mail Access Checker.zip
If you are looking to check if your own email has been compromised in a data breach, do not use downloadable tools from unknown sources. Instead, use reputable, web-based services: HackUs Mail Access Checker is described as being