[mlmmj] lost connection after DATA (6 bytes) from MyPC

Hello everyone,
I recently installed and configured an mlmmj mailing list integrated with Postfix. I'm new to using mlmmj. Everything seems to be working fine but when I try to confirm a mail list subscription by replying to a message, my mail server gives me an error:

"lost connection after DATA (6 bytes) from MyPC"

My Postfix has mailscanner/msmilter integrated. I tested by sending an email from my webmail which appears to be sent from localhost and that worked fine. The reply confirmation message is the only difference. When sending from Outlook, there seems to be something in my configuration cutting the communication at the moment of replying...

Hello everyone,
I recently installed and configured an mlmmj mailing list integrated with Postfix. I'm new to using mlmmj. Everything seems to be working fine but when I try to confirm a mail list subscription by replying to a message, my mail server gives me an error:

"lost connection after DATA (6 bytes) from MyPC"

My Postfix has mailscanner/msmilter integrated. I tested by sending an email from my webmail which appears to be sent from localhost and that worked fine. The reply confirmation message is the only difference. When sending from Outlook, there seems to be something in my configuration cutting the communication at the moment of replying...