Email get rejected

May 5 02:06:55 box postfix/smtp[5120]: A4A1714070C:,[]:25, delay=1.4, delays=0.35/0.04/0.59/0.39, dsn=5.0.0, status=bounced (host[] said: 554 Denied [CS] [] (Mode: normal) (in reply to end of DATA command))

i keep receving this error when sending email to this domain. something wrong with my setup?

Seems like mail was rejected by Mxlogic / Mcafee because of the content of the message.

Some useful informations:

its just normal email.
before this, using cpanel, no problem. same email, using mailinabox system, get rejected.