Is it possible to get all of the email address from comments on your wordpress blog? I would like to send everyone who has made a comment on my site an email.
You can get it through the database. I created an admin page to do this.. Not sure if there is a way through the interface though.
I don't think a plugin has been created for that purpose. You can just do a SQL dump of your comments table into a csv file and import into your favorite bulk emailer program...
It is simple to grab them all from the database using phpmyadmin. If you need help feel free to contact me and I can walk you through it.