Currently, exim4 forwards all email at my domains to my gmail account. (And my brothers' to their accounts.) Using a split configuration, (/etc/exim4/conf.d/routers/350_exim4-config_vdom_aliases) uses (domains = dsearch;/etc/exim4/virtual), where i have a number of files, one per domain/sub-domain, with (* : ...@gmail.com) as the content. (It's actually symlinked to a file with those contents.) Now, i have Cyrus and Squirrelmail installed, and i want to host my email locally, though still forward a copy of the emails to gmail.
How do i setup exim4 to deliver email to my cyrus (sasl) and forward a copy of them to gmail?