You can have as many accounts as you like if you own a paid version of eM Client.
You have to also “create an app password in your Yandex account” for eM Client and not use your normal email password as per @Quesito advised in the following thread.
You can have as many accounts as you like if you own a paid version of eM Client.
You have to also “create an app password in your Yandex account” for eM Client and not use your normal email password as per @Quesito advised in the following thread.