They are two different protocols. Post Office Protocol, which works like a post office box, where you go to get your mail, and Internet Message Access Protocol, which works by synchronising with the server. In most cases, I recommend IMAP. These pages may help you decide:
Sure, some fresh injuries might hurt for a short time frame. However, unless there is a definitive neurological link, these will heal and the pain should stop. If not, then there is a good chance that the pain is not due to the herniated disc at all. So, some herniations can heal, some may not. Degeneration never heals. However, statistics show that healing is not needed in order for the back or neck symptoms to resolve.
Injury to the disc may occur when neck motion puts too much pressure on the disc. One of the most painful injuries that can occur is a herniated disc. In this injury, the tear in the surface of the disk is so bad that part of the inside of the disk squeezes out. A tear or rupture can occur anywhere around the disc.