Add Your Email Accounts to Gmail

Go to your Gmail account and log in with your credentials.

Click on the Settings icon (it looks like a gear) and then select See All Settings.

In the Accounts and Import tab, find the Check Mail from Other Accounts section and click on Add a Mail account.

Enter the email address from which you want to import your emails.

You'll be given the option to either link accounts or import emails from other accounts. Choose the one that suits you and click Next.

Provide the necessary login details for your IMAP account and click the Sign In button.

You might need to allow certain permissions, so go ahead and click Save and press Close.