i solved the "email system mail" issue by looking at the postfix man page.
But stil does not get email when virus scan remove attachment.
Here is what tail -f /var/log/mail.log says
dccproc: no working DCC servers dcc1.dcc-servers.net dcc2.dcc-servers.net dcc3.dcc-servers.net ... at 220.127.116.11 18.104.22.168
Oct 2 16:44:19 Apie amavis: (03070-13) Blocked BANNED (application/x-msdownload,.exe,.exe-ms,winbox.exe), LOCAL [192.168.0.101] [192.168.0.101] <email@example.com> -> <firstname.lastname@example.org>, quarantine: U/banned-UttzzRvUsvCz, Message-ID: <007e01ca436e$b291bec0$045513ac@toyotaemile>, mail_id: UttzzRvUsvCz, Hits: 2.456, size: 52896, 12983 ms
How can i send that email is to be send to sender that informs him that email was remved or to reciever.