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How Spam Filtering Works: From SPF to DKIM to Blacklists

via deliciousbrains.com => original post link

Have you ever wondered why it’s so often recommended to use a dedicated email service like Amazon SES, Mailgun, or other email services? Maybe you’d rather set up your own email server?

I’ve long been guilty of only having a vague understanding of what goes on under the hood of email, and what causes emails to be sent reliably or sent straight into spam. In this week’s article, I’m going to dig into just that to find out what makes a reliable email service.

What Causes Email to Go to Spam?