Gmail
What Happens When a Workspace Mailbox Runs Out of Storage
Quick Answer
When a Workspace mailbox reaches its storage limit, new incoming mail typically bounces back to the sender instead of being delivered. Checking storage usage in the Admin console is a quick way to rule this out as a cause of missing mail.
Storage limits are easy to overlook because they build up gradually, and the eventual symptom - missing mail - looks identical to several other unrelated problems.
Common Causes
- Large attachments accumulated over years without cleanup.
- Shared drive usage counting against the same storage pool, depending on the plan.
- A user unaware that storage is close to the limit until mail actually starts bouncing.
Safe Troubleshooting Steps
- Check the specific user's storage usage in the Admin console under Directory > Users.
- Identify large attachments or old data that can be archived or deleted.
- Consider whether an edition with more storage is needed if this is a recurring issue.
What to Verify
- The affected mailbox is not at or near its storage limit.
- Bounce messages (if any) do not reference a quota or storage error.
When Professional Help May Be Useful
If storage keeps filling up despite regular cleanup, it may be worth reviewing whether the current Workspace edition's storage allowance actually fits how the team uses email and shared drives.