Email Storage Limits: How Much Space Does Your Business Actually Need?
How much email storage does a business actually need?
Most teams either wildly over-buy storage or get caught out by a full mailbox at the worst possible moment. The honest answer is that it depends on how many people you have and how attachment-heavy your work is — but you can estimate it closely. As a rough guide, a single active mailbox grows by about 2–8 GB per year for normal business use, and faster if large attachments fly back and forth daily.
- Light user — mostly text, few attachments (e.g. a sales or notifications inbox): ~1–3 GB/year.
- Typical business user — a normal mix of attachments, long threads and calendar invites: ~3–8 GB/year.
- Heavy user — contracts, design files, media, scanned documents: ~10–25 GB/year, and worth tidying regularly.
To size your account, multiply by the number of mailboxes and the number of years of mail you want to keep, then add about 30% headroom. For example, a 5-person team keeping roughly three years of typical mail needs in the region of 60–90 GB total.
What actually counts toward your storage
- Inbox, Sent, Drafts and folders — every message you keep, plus its attachments.
- Attachments — usually the single biggest factor; one slide deck or short video can be tens of MB.
- Trash and Spam — these keep counting against your space until they're emptied.
- Shared mailboxes and groups — shared team inboxes draw from the same account storage.
How storage works at RodMail
Your plan includes a storage allowance for your whole account, shared across all of your mailboxes and domains — not a separate, smaller box bolted onto each person. Plans scale from 7 GB on the Free plan up to 200 GB, and you can add more storage to any plan as you grow, right into the terabytes, without switching providers.
Just as important is what you don't pay for. RodMail's paid Unlimited plans give you unlimited mailboxes and unlimited domains at a flat monthly price — there are no per-user fees. So the number you actually size for your business is storage, not seats: create as many addresses, aliases and shared inboxes as you need, and only your total storage counts.
- Free — 7 GB. Ideal for getting started or running a single small inbox.
- Unlimited Standard / Extended — 10–20 GB. A good fit for small teams.
- Unlimited Premium / Premium Plus — 45–90 GB. Built for busy teams and heavier attachment use.
- Custom / Enterprise — 200 GB and up, with add-on storage into the terabytes.
How to estimate the right plan
Use a simple formula: (average mailbox size) × (number of mailboxes) + 30% headroom. If you're migrating in, your current provider can usually show each mailbox's size — add those up for an accurate starting point. If you're unsure, start one tier above the bare minimum; topping up storage later is a couple of clicks, and because there are no per-user fees, growing the team won't quietly inflate your bill.
Tips to keep storage under control
- Empty Trash and Spam on a schedule — they silently eat into your allowance.
- Move large files to RodMail Drive and share a link instead of attaching the file to email.
- Archive or delete oversized old threads that carry big attachments.
- Use shared mailboxes for team addresses rather than forwarding copies into everyone's inbox.
Getting started
Not sure how much you need? Start free with 7 GB, watch how your mailbox actually grows, and scale storage when you genuinely need it — no per-user fees and no migration headaches. Create your free RodMail account and size storage to your business, instead of squeezing your business into someone else's limits.