Support reporting email addresses

[bradleyjkemp]

This is a fairly similar problem: maintaining a list of email domain -> abuse contact (however there's no WHOIS data available so this would be purely manual).

Questions to answer:

• [ ] How to handle the two slightly different "types" of email domains and phishing domains?
• [ ] What information is needed in an email address report? You can just provide a URL for a phishing site but just providing an email address isn't going to work