To set the time on the WebMail (http://webmaildomini.aruba.it) you need to click on Options > Your details > and select the Time zone that you prefer, as shown below:
Attention!!! the Time zone: Your Browser Timezone option inherits the time setting of the Web Browser and therefore the settings of the Operating System.
We remind you that the Timezone is usually available in the notification section and allows you to view the date and time of various places in the world.
If the WebMail is set on Time zone: Your Browser Timezone, and the Timezone of the Operating System is not configured correctly, the time of the messages may not correspond to the actual sending time.
Therefore it is important to keep the clock of your computer aligned, so that the messages can be viewed in order of time (moreover many servers refuse posting with "future" time).