I cannot set up one of my POP accounts with Zimbra. Zimbra installed correctly (I have the latest build) and I successfully set up my comcast account, but I have another private account that I just can't get to work. I have the correct user name, email address, server names, and password. I tried adjusting the outgoing port from 25 to 587 (587 works in Outlook and on my iPhone), but still it doesn't work. Don't know what to do!