WebCrawler is a tool that extract all data from an URL and create a text file with all words, that can be used like a wordlist for many things. You can extract all emails that the tool can find.
Steps:
clone the project
$ git clone https://github.com/jmessiass/webcrawler.git
install requirements and execute the script using python 3
$ cd webcrawler
$ pip install -r requirements.txt
$ python3 webcrawler.py
choose a option (just option '1' in this moment)
1
set the URL
http://target.com
Now, analyse your new wordlist in your current path!