Account with Forwarding (DirectAdmin)

If I want an account (so I can use the SMTP to send email), but I also want to forward the email to another address, how would I set this up?

Note: I am generally having an issue with emails bouncing back as “550 No such recipient here” even though I created the account, but I figured I would start at the root of the problem.

It really is as simple as creating the account and a forward rule.

…my actual issue was caused by Underscore In Email Address