Tech girl: How to make sure your emails get delivered, not blacklisted

You’ve just typed up your monthly email to your loyal followers and clients, and hit the magic button – send!
Later that day, you realize something strange. You can’t send emails. And you haven’t received a new email in quite some time. What’s happening?
You’ve been flagged as a spammer.
How did this happen?
For starters, this happens to many well-intentioned people. That message you sent to hundreds of people from your regular email account has landed your em