problems installing mailscanner in debian

[Sander K. Naudts]

I was trying to install mailscanner with debian (apt-get install mailscanner
but I got the following error):

Setting up mailscanner (3.13.2-4) ...
hostname: Unknown host
dpkg: error processing mailscanner (--configure):
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 mailscanner
E: Sub-process /usr/bin/dpkg returned an error code (1)

How can I fix this?


Sander