Sending bulk emails is easy once you have everything set up in karma. There are a few things that need to be done prior to sending emails.
In order to send bulk emails, your account needs to be on the Pro plan. If you aren't sure what plan you have, you can speak with the owner of your account or ask the support team.
The next important thing is that you have to have the email integration set up.
You should check with your email provider to see if there is a limit to how many emails you can send at any given time. This is very important. If you go over your limit through the email provider you could get blacklisted as a spammer even if that wasn't your intention.
Now that we got all of the "rules" out of the way, let's send some bulk emails. Here is a quick series of videos on how to do just that.