In order to keep Google's IMAP servers running smoothly for all of their customers, Google has IMAP usage limitations. Google enforces IMAP usage limitations by throttling back the speed at which it responds to IMAP clients and by temporarily disabling IMAP access after excessive usage. In order to work within Google's usage limitations, CloudPull limits the number of messages it downloads during each backup cycle. By default, CloudPull downloads 5,000 messages per backup cycle per account, and uses up to four simultaneous connections per account for downloading messages.
While the “Moderate” setting is recommended for most customers, the appropriate level for each customer is dependent on his or her usage of Gmail IMAP. If you are using Gmail IMAP extensively from your Mac, PC, tablet, and phone, you may be safer setting the message throttling level to “Conservative”. This will help ensure that your IMAP-based email clients remain connected and responsive, and that CloudPull can perform its backups without interruption. On the other hand, if you are in a particular hurry to get a complete backup of your email, you may wish to set the message throttling level to “Aggressive”. This setting does put your ability to access your Gmail account via IMAP at risk temporarily, but in most cases this will result in your first complete backup happening much more quickly. You can select “Unthrottled”, but in most cases this is not advisable.
If you change how often backups are performed, backups will still take place every hour while there are items that have not yet been backed up by default. If you wish CloudPull to honor your backup frequency even when there are messages that have not yet been backed up, you can uncheck the “Backup every hour until the initial backup is complete” checkbox.