Mail forwarding and auto-responses not working

Hello.

Im using plesk 12 with postfix and the Mail forwarding and the auto-responses are not working, the same issue might be cause these two problems.

The forwarded email doesn't show up in the maillog and the /usr/sbin/sendmail.postfix is there.

Whenever i start the postfix service this shows up:

"
postfix/postfix-script: warning: not set-gid or not owner+group+world executable: /usr/sbin/postdrop
postfix/postfix-script: warning: /usr/lib/sendmail and /usr/sbin/sendmail differ...

Mail forwarding and auto-responses not working