How do I reset my email notification back to my inbox only

[Android Central Question]

A week ago I set up a new account at a vendor (Farm & Fleet) the email telling me my order was ready for pickup was in my Junk mail folder. I had to open it through the junk mail folder in order to move the email to my inbox. Since then I only get junk mail notifications, not the normal notification from my inbox. How do I fix this issue. I am using a Galaxy S8. Any help would be great, thanks!