Nobody sane who cares about keeping emails uses IMAP!
Apart from a few other things (stay tuned) in the IT world, IMAP is a very prominent example of evil.
Many people today claim that nobody uses POP anymore and most email providers nowadays offer access via IMAP. But they couldn’t be further from the truth.
Once you’ve used IMAP and lost (more or less important) emails, you start hating it and might move back to POP.