Using simple search operators we are able to simply pull Email data from search results.

Canary Search is a site that uses multiple PasteBin like sources to scrape and recover PII and store it for monitoring purposes. This may contain a major source of DOXs and Data Dumps.

A great way to recover emails from raw Html of your targets Web-Site. This can be a great way to find hidden emails as well as locations not indexed by google!

May only provided you with a few emails, but this is a great source for distro list based email to IT.

Using Email hunters trial API we can enumerate multiple emails they have recovered from multiple sources. You may want to use their JSON API to gather the exact source they found the email if needed.

Using the static front page of Flickr I have found tags and usernames as emails in the past. It never hurts to check fast right?

Using a simple HTML parse we can pull Emails from Instagram users using their API.

While the Search engine is not as easy to use as google. It is a great back up source to google when they captcha you!

Often coders will place emails in their license file and in other parts of the code for contact info. This can be dangerous when open source. Also seen this during HTML Dev quite often.

Using common Regex for Emails we can easily find a email in the source Html of the search.

While Searching PGP public keys is easy, they seem to block large queries like Gmail.com. Great source to check!

Searches for "lead" documentation using Exalead.com. This will search PDF, Xlsx, Doc, Docx, and PPTX files.