Mail problem

So I have this problem, I can send mails but not receive.
Here the error log.
I can't get it fixed, please help :(

this log shows:

open mysql:/etc/postfix/,: No such file or directory

that, postfix configuration is not complete.
To fix it, try:
ehcp gui-> fix ehcp/mail configuration.
mak sure your ehcp daemon running before you give this command.