the condition is my server had a lot of this email, aproximately 1,2 million mail from postmaster. kind of huge amount, isn't it?
and now i want to know why my system generate this kind of mail?
anyone please explain me :D
There is no error mentioned in your log file. The postmaster messages appears to be a mime attachment. It could be anything from a wrong gateway or smtp relay permissions. Mime is not encryption, but conversion (base64) from 8 bit to 7 bit - Internet email messaging standard is 7 bit US ASCII. Perhaps you have binary content or local language characters in your text. If you don't know how to decrypt mime, there are tools and also plenty of free services on the web where you can cut and paste such text into for conversion.