Spam Problems CPanel not secure...

hi all,
i have several problems with spames. I finde about 10.000 mails in queue every 24hours. I also note that it is possible to send out mails via SMTP without authentication. I have however, turned ON the SMTP tweak in WHM.
So is there any defenitly way to disable the SMTP server on a cPanel server so that nobody but really no one can use mail.domain.com to send e-mails??


thanks a lot

 

 

 

 

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