Step1, As seen in the image below, click on the Steam icon and sign in using a Steam account.
Step2, After signing in with a KRAFTON ID, find Steam in Platforms and click on Unlink on the right.
(Note: After unlinking a Steam account, you cannot relink it nor link to another KRAFTON ID for a set period of time. This is only recommended when you are checking the info on the email linked to a KRAFTON ID.)
Step3, After unlinking the Steam account, sign out from the KRAFTON ID page and sign back in by following Step 1 to see the email info as indicated below.