When using an imap client for google apps mail, a message containing the following text is received
Your IMAP server wants to alert you to the following: Invalid credentials (Failure)
You may see this error if your account name or password is set up incorrectly. In the case that the credentials are correct, it may be a symtom of an account that is being hit too hard or often, and Google has locked it as a precaution against robots. One thing to check is the frequency in which the imap client checks for new mail- less then 5 minutes can be too fast.
Visit the following link, after tailoring it for the specific domain in question:
This link needs to be edited to reflect the proper location- replace yourdomain.com with the correct domain name.
For a non-google apps account, the link is