I HIGHLY recommend this:
https://gmailextract.com/
Use a fake mailchimp, seperate it out in 2k emails each.
View attachment 10624
I subscribed to Google Groups and made all their emails go to a LABEL. Thats how I farmed the Occupy Protest emails in about a month.
I have a ridiculous amount now, but I really have no use for them. I had some Hackathon campaign where I archived every single Tweet in a bunch of #occupy hashtags.
Here is access to the data I mined from twitter if for some reason you want to play with it.
http://twitterminer.r-shief.org/owscsv/
login - rshief
pw - occupy