/var/lib/mireka,
which contains a soft link named log, which points to the /var/log/mireka directory,
which in turn contains the log files.
The place of MIREKA_HOME depends on your system and installation method:
/opt/mireka.
/var/lib/mireka.
Directories within MIREKA_HOME:
bin: start programs/scripts
classes: custom, compiled Java classes can be but here
conf: configuration files
doc: HTML user documentation, you are reading it now
lib: Java libraries, including Mireka itself. Custom libraries can also be put here.
log: log files
maildrops: contains one subdirectory for each user account, received
mails are stored here, until the user downloads and deletes them via POP3
postmaster: Mireka stores a copy of each mail sent to Postmaster in this directory for debugging purposes
queues: mails waiting for transmission to another server are stored here