Imap configuration not found

Good day,
i’m running tailscale on a synology nas and i’m using it without any particular issue alonside other containers as adguard.
The only issue i have atm is related to my gmail account as any client i tried isn’t connecting to google servers outside from home even if i configured with auto auth2 discovery or with manual setup. Is there some special setting i have to insert? This problem is manifesting on my laptop only. My nas is configured as exit node, advertises one route but my clients aren’t using it as exit node.