@SlackHQ ¿How to send an automatic message (like DM) for a new members in our Slack space? (I'm not talking about the first steps page, I talk about a private message) 
Workflow Builder can do this. It should be pretty customizable to your needs! Guide to Workflow Builder: https://slack.com/intl/en-ca/help/articles/360035692513-Guide-to-Workflow-Builder … Automatically onboard new channel members:https://slack.com/intl/en-ca/slack-tips/automatically-onboard-new-channel-members …