Ho to forward root mails to external account?

I use Debian and tried with .forward and /etc/aliases files but no success.

this is queue log:
-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
599A211628B 443 Sun Nov 20 12:03:21 [email protected]
(connect to cp.domain.com[1.2.3.4]:25: Connection refused)

 

Sorry, found the mistake, dovecot was turned off