You can find all email settings by clicking on the 'Settings' menu and then selecting the 'General' submenu.
To set up an SMTP server for your own email server, follow these steps:
In the dropdown menu next to "Email provider", choose the Custom option. This option lets you manually enter the details of your own email server.
In the 'Smtp server' field, enter the address of your mail server.
In the Username field, enter the email address that has access to the mail server.
In the Password field, enter the password that belongs to the username for the mail server.
Once all fields are filled in correctly, save the settings.