CiviCRM defaults to sending emails with fraudulent 'from' fields

Suppose I have a civicrm contact and I have set my primary contact email to, eg., torrance@gmail.com. Then civicrm uses this email address as my preferred 'from' address for any emails I generate, such as sending an email to a contact or when emails are automatically fired off, such as during activity creation.

I don't think this is the correct behaviour. Big email providers know who can send email on behalf of, eg. yahoo/gmail/hotmail, and will discard any emails originating from errant servers claiming to send mail on their behalf.

Instead, either 1) all emails from a civicrm installation need to default to a single sanctioned email address on a domain that is under the control of the provider or 2) each contact needs a unique autogenerated email address that resides on a domain that is under the control of the provider. In both cases, the provider can take steps (using SPF and DKIM) to sanction the server sending emails from their own domain.