How to stop Mail app from repeatedly asking for password
I have a university email account set up on my macOS Mail app. This email account is now no longer active as I've finished uni, but I want to keep the mails for records. However the Mail repeatedly asking for the password. I skip it every time but it keeps on coming.
How do I stop the Mail app from repeatedly asking for password. There surely should be checkbox to never ask me again.
MacBook Pro Retina