I used this method to get large amounts of account emails easily.
First, go to the realm list and select the realm you want to get emails on. You should see a guild progression list like this.
WoW Forums -> Aegwynn - Guild Prgression IV
Second, go to this progression list and click on any of the guild websites. Find a member list, many of these forums will have publicly available email from members. I did this on my home server and got 183 emails. I did this on another server an got about 200 more. This is an easy method to get large amounts of emails.
Then you can mail whatever phishing site or method you wish to use with these people. Out of the 183 people I emailed 20 percent fell for it. Great to get tens of thousands of gold.
Happy scamming.
Edit: If you really want to simplify is there are a few topics in this forum on programs which will auto record every email on a web page, if you use that with this setup it will be much easier.