ClosedAfter install of mail scanner . my vps can't send / recieve any mail

Hello Community
happy new year to all membre
my problem is

i have install the mail scanner after that i lost send/recieve mail in my vps

how i can resolve this problem

Without error details we cannot help you bro. We need to find the reason for the error so that we could guide you accordingly.

Thank you Bro for your Replay .

i have resolve this problem after unistall of mail scanner . that is cause of that .