Offline mode for old email accounts that no longer exist in the server side

I am wondering how I suppose to switch off attempts to connect to the server in some of my old accounts that are no longer exist on the server-side but I am keeping them in the eM Client locally to have access to my old emails.
I can’t find any option to put a specific account in offline mode.
For now, as a temporary solution, I have changed the password but it is very annoying to see the message about the impossibility to establish a connection to the server.
I would appreciate any help.
Thank you.

martes 08 marzo 2022 :: 1833hrs (UTC +01:00)

Go to: Menu ->Accounts ->General ->Include when sending/receiving emails (Uncheck this)

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