Use version v0.1.2-alpha as an example.
Notice that the format of file is tar.gz (not rar or zip), and if your unzip software can't open it, Chan another one, such as tar command in git bash.
logs: the directory stores all logs.
logit.conf: the config file of logger. Check logit's documents to know more usages.
postar.ini: the main config file of postar. Check _examples/config to know more usages.
postar-xxx.exe: the executable binary file.
If you don't know how to set, get some helps from your smtp service.