Ask How do you set up automated welcome emails for new members?

[SuperAffiliateX]

I want new members to get a welcome email as soon as they sign up, but I don't know how to set it up. I want the email to be automatic and include a friendly message, login details, and maybe a quick start guide. Do I need special software, or can I do this with a simple plugin? I also want to make sure the emails don't end up in spam. What's the best way to set up automated welcome emails for new members?