Instead of generating your own e-mail list, you may find that a target organisation will have some that exist on their web pages. This may prove to be of higher value than e-mail addresses you have generated yourself as the likelihood of e-mail addresses on a target organisation's website being valid will be much higher than ones you have tried to guess.
For this recipe, you will need a list of pages you want to parse for e-mail addresses. You may want to visit the target organization's website and search for a sitemap. A sitemap can then be parsed for links to pages that exist within the website.
The following code will parse through responses from a list of URLs for instances of text that match an e-mail address format and save them to a file:
import urllib2
import re
import time
from random import randint
regex = re.compile(("([a-z0-9!#$%&'*+\/=?^_'{|}~-]+(?:\.[a-z0- 9!#$%&'*+\/=?^_'"
"{|}~-]+)...