Measure what you actually keep
Check total usage and the largest folders, including sent mail, trash and spam. Estimate annual growth. If usage is already near 10 GB, plan cleanup or a different storage arrangement. Your own measurement matters more than a theoretical message count.
Store large files appropriately
Where appropriate, share secure file links instead of repeating large attachments. Keep archives searchable and backed up. A local archive is not safe without recovery planning. Never delete the only copy just to reduce usage. Check whether deleted items still count temporarily.
Your practical checklist
- Measure current usage.
- Check the largest folders.
- Estimate annual growth.
- Back up before cleanup.
A useful question
Is 10 GB the message size limit?
No. Mailbox storage and the maximum size of one message are separate limits.
Ready to check your name? Start with the exact domain, then compare alternatives. Find a domain →
Sources & further reading
Original guide by chname.ch editorial. Archive dates organise this library; this guide was created and reviewed on . Provider and registry instructions take precedence when requirements change.