Gmail – Imported Mail Going to Spam Folder

I have 2 gmail accounts, for example: user1@gmail.com and user2@mydomain.com (using Google apps).

On user2@mydomain.com I went to settings: Check mail from other accounts: and added user1@gmail.com

After doing so, all the emails from user1@gmail.com were moved and transferred directly to user2@mydomain.com but went all into the spam folder as you can see here:

User1 Inbox:

User2 Inbox:

Obviously this is a HUGE problem because the emails going to spam will be automatically deleted. My question is, how can I reverse this process and get all those emails in spam back to user1@gmail.com as they were before?

Thank you.