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CC3200: SMTP server responds "the use of this system to transport unsolicited, 220 and/or bulk e-mail" to Helo command

Part Number: CC3200

Hello,

I am trying to send an e mail to my account in my smtp server installed somewhere in bluehost.com, So i took the e mail example and i did some modification to avoid sending mail from uart.

I faced this problem: the SMTP finite state stops at helo command and the server send me this message:

"the use of this system to transport unsolicited, 220 and/or bulk e-mail".

I modified the Helo command several times to try finding a solution but nothing happens always the same error message from the server.
I also tried to modify the security method and the cypher ,i lost the connection to the server.

Thank you.