Problem in content filter

Hello ,

I've enabled amavisd on my mail server but after awhile many messages could not be delivered , or received .
I see logs in many messgaes as follow :

3963288524E    64591 Mon Mar 11 08:53:39  lanasser@palnet.com
                   (connect to 127.0.0.1[127.0.0.1]:10026: Connection refused)
                                         labuhijleh@gmail.com

D6B9A880C85    14279 Mon Mar 11 08:53:19  sainarik@palnet.com
                   (connect to 127.0.0.1[127.0.0.1]:10026: Connection refused)
                                         fainarik1@gmail.com

and sometimes at port 10024 connection refused .

my related config files are attached ,

your help is appreciated .