Setting up SPF, DKIM, and DMARC for outgoing emails on an Ubuntu web server

Apparently, just under half of all emails are spam . If you want to send emails from your web server (for example, system monitoring emails ) and you don’t want to pay for a third-party SMTP service like Amazon SES or Mailgun , you’ll need to take steps to avoid your emails being flagged as spam by your recipients’ email providers. There are three anti-spam measures that overlap: Sender Policy…