The single quote message not received

[kmanickam]

Hi All,

I am facing problem with our zimbra open source server. Any one sending message with single quote email id address like 'xxxxxx@xyz.com' this message not receiving our mail server. same message will ask them remove the simgle message like xxxxxx@xyz.com this message well received by our zimbra open source server. please advice some how do i resolve this issue

Please help me

Thanks
Manickam