Different Email IDs

I used my primary personal email address to sign up for Simplify; I use this email to sign up for any product/website. I then have a second email address that I use exclusively for submitting job applications. This ensures I never miss something related to a job application and I don’t have to constantly see rejection emails in my inbox.

I’d like to be able to use that second email id in my Simplify contact info without changing the email id used for my Simplify account credentials.