thanks for the quick reply. however i have no experience with that product. i can setup postfix using Ubuntu and it would be great if you can kindly guide me from there.
1) configure postfix for multiple domians (tutorials I see here use mysql database for domains and i think i might not need that because there will be few domains the system will be handling)
2) configuring mailscanner with postfix to strip the attachments and append a message to the original mail.
another question is can we configure postfix to accept emails without having us to create users in the local system?
To be more clear the mail flow would be like this
Internet --> proposed system (strips attachments on per domain basis)---> final MTA with inbuilt A/V , SPAM detection and user mailboxes.
I know the setup is bit strange but unfortunately the final server DOES NOT support attachment blocking
No issues with outbound email. they'll be directly sent by the email server with email boxes.