mail secure authentication help

Hi,

I have a CentOS 3.5 rental server, apache 1.3 and cPanel/WHM installed.

I am trying to read emails from my server, with
"Use secure authentication" is checked in my mail client.

But I get, "Mail server does not support secure authentication" message.

Can some one explain to me how can I enable secure authentication on my mail servers? or give me some advise what to do, where to look?

Thanks in advance...

 

 

 

 

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