I have just set up a Debian 3.1 Exim4 MTA (my first ever attempt at this) and want to send and receive mail via the Astaro SMTP proxy.
I can send mail out fine but when I try to return the message I get the above error message in the Astaro SMTP Proxy log.
I have searched for the error message on Google but couldn't find it. Not sure what to try next.
This thread was automatically locked due to age.