Mailbox Storage
Monitor institution storage pools, per-mailbox quotas, and request additional capacity from ICTA.
Overview → Storage shows how much disk your institution uses across hosted mailboxes and file attachments. Only ICT administrators and Authorizing Officers can open this page (mailboxes:admin); everyone else is redirected to the dashboard.
Institution storage pool
The Institution storage pool card shows the pool ICTA granted and how it is split:
| Metric | Meaning |
|---|---|
| Granted | Total pool granted by ICTA (auto-derived at allocation: allowance x 5 GiB) |
| Used | Total bytes consumed across all mailboxes |
| Committed | Sum of the quotas handed out to individual mailboxes |
| Available | Headroom left in the pool for new grants |
| Pool used | The higher of usage or committed quota, as a percent of the pool |
A separate Institution total card shows combined usage against the org quota (or Unlimited when no quota is set).
A warning banner appears when the pool crosses roughly 80% used (by actual usage or committed quota), prompting you to request more from ICTA.
Per-mailbox breakdown
The report lists each mailbox with:
- Maildir: message bodies and attachments stored on the mail server
- S3: large files and composer uploads linked to the mailbox
Click a mailbox row to open its detail page or grant additional quota inline.
Largest files
A table ranks the biggest stored files org-wide so you can find messages or attachments consuming disproportionate space.
Request more storage
When the pool is tight:
- Click Request more from ICTA on the Storage page to grow the institution pool (ICTA-tier request), or
- Open a mailbox detail page and click Request more storage for that mailbox (org-tier request, decided by an ICT administrator).
ICTA reviews institution-pool (ICTA-tier) requests the same way as mailbox allocation; org admins decide mailbox-level (org-tier) requests in-app from the Storage page. Approvals increase the institution pool or the mailbox grant.
Storage requests are separate from mailbox count allocation. You can have enough mailboxes but still need a storage increase for heavy attachment use.
Grant quota to a mailbox
ICT administrators can grant bytes from the available pool to a specific mailbox without waiting for ICTA, up to what remains uncommitted in the org pool.
Next steps
- Mailboxes overview: allocation and creation
- Managing mailboxes: per-mailbox settings
- Webmail settings: officers can view their own usage under
/mail/settings