I am using a 6.5 client setup with a POP3 and ASMTP account (for DSL) with my ISP - ATTGLOBAL. I was able to pull down my mail once and selected to leave mail on the ATTGLOBAL server which it did. But I deleted all the mail docs and then tried to replicate again. However, no mail will transfer from the POP3 server. It is almost like the client or POP3 server has tagged mail and thinks it is still resident on the Notes mail file. In R5 this would just append my mail file.
Same thing happens when I user Outlook on the same machine. Is this an XP/Professional thing ?