Oh yeah that will do it. Also, if you were seeing outgoing mail not deliver from your account, it's probably because SPF and DKIM weren't set up for the account (we don't configure these unless people ask for it). I've gone ahead and set those up for you and also restored your mail service.
We recommend avoiding using the forwarding function in Plesk, as every forwarded email counts as a sent message, and simply receiving a bunch of mail can cause you to lose your email service...
Finally, now that email is enabled again and SPF and DKIM are set up on your account, we recommend sending a real email (not just the word "test" or a blank email) to https://www.mail-tester.com/ to make sure that everything is set up correctly. If you get less than a 10/10 score please post a link to the full report so we can help you fix any other issues that there may be.