Busines rules: Routing mail ticket to SITE

Hi,

i have set up various mail address aliases for different sites.
Something like "support.site1@domain.com" or "site.site2@domain.com".

All aliases point to the same mailbox which is the one SDP fetch from.
That is working fine.

Now i'd like to route those mail ticket to the right site tecnicians, but i don't know how to do it.

In the business rules the only way i can intercept these mails is in the "Default Settings" site.

Unfortunately as i interecept them I don't have a "Assign to Site" action available.
Furthermore i cannot assign to tecnician in that site if the tecnician role limit him to just his own site.

It would be possible somehow to route those tickets frome "default setting" to any site and then assign them to a site tecnician?

Thanks a lot