I'm curious... Can someone explain what the difference is between IMAP and POP type email accounts? On my old Macs, I was always using POP. Now (by default), they are all IMAP. I have 8 different accounts. Just wondering if I should have tried to set them up differently. The main reason for my question is that I've been having an issue with Mail asking for my password every time it checks mail (which is set for 5 min). It did not do this in the beginning and I've only had this new MacBook Pro for 10 days.