@aruba.it; @technet.itaccount configuration
Starting from the 01/12/2009, all those with either the @aruba.it or @technet.it email account and who use a mail Client must select the “My Server requires authentication” check-box in the Outgoing Mail Server settings.
This configuration is necessary so that your email account works correctly as it avoids any problems with sending and receiving messages.
The “My Server requires authentication” option is found in the more common mail Clients like Outlook or Outlook Express, with the “smtp” field.
On other mail Clients it may be called in a different way but it is still found among the options of the account configuration section.
You can find more information about how to configure the accounts and what parameters to use at : Configuration of @aruba.it; and @technet.it accounts.