kmail 1.5.1

I'm running 8.2 with kmail 1.5.1. I like to check my home email from work an leave the messages on the server that That i get them when i get home also. I looked in the setup of accounts in kmail an could not find an check box where I could set that up to leave the messages on the server. can anyone point me to where its located. thanks. I know that i have used this feature in the past with kmail. jack network admin Horizon industires