500 command unrecognized
Problem reported by Kheng Hai Quek - 10/26/2014 at 7:23 PM
Dear Admin,
My Client is having issues with his email. My smartermail (server) is based at Singapore. When I perform a self test at my computer, everything is working fine.
However in China, my client is unable to send. I checked the smtp log and saw a 500 command unrecogized.  
09:57:49 [][24779268] cmd: 
09:57:49 [][24779268] rsp: 500 command unrecognized
How do I resolve this

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