- Your messages suddenly stopped downloading
- You have to re-enable POP every time to continue downloading
messages
- Only some messages are being downloaded while others are being
skipped
- The same message is being downloaded over and over again
- ALL your messages are being downloaded again

If so, here are 3 simple solutions that can help fix your problem:

1. Try enabling recent mode in your POP client by replacing
"[email address]" in the Username field of your POP client settings
with "recent:[email address]", and configure your POP client to
leave mail on the server. Recent mode only fetches the last 30 days of
mail, so it's ideal if you don't want your smartphone to download
thousands and thousands of messages. Disclaimer: If you don't leave
messages on server in your mail client settings, your messages may get
moved to Trash after download. For more information on recent mode,
check out http://mail.google.com/support/bin/answer.py?answer=47948

2. If you're not using recent mode, ensure that your email client is
NOT configured to leave mail on the server.

3. Try deleting the entry for your Gmail account in your POP client
and then re-adding it with all the correct settings.

If these steps don't resolve your problems, check out Gmail IMAP!