When your mail was moved to Google, Google couldn't accept any attachments larger than 25 MB. This means that you may be missing some mail in Google. To find these emails (so you can download the attachments), you should perform this search in Zimbra:
- Login to Zimbra (zimbra.humboldt.edu)
- Click in the Search box above your mail
- Paste "size: >15mb" (minus the quotes)
- Click Search
- Your messages that are larger than 15 MB will be displayed. You should download the attachments to make sure you have them.