If your agency already runs client sites, VPS instances or dedicated servers on OVHcloud, someone on your team has probably looked at OVHcloud's own Email Pro product and wondered whether it's worth adding client mailboxes there too, instead of running a separate email platform like Atriomail. The pitch looks tempting at a glance: OVHcloud lists Email Pro at £1.39 ex. VAT per account per month, the same three digits as Atriomail's $1.39 per mailbox. Same price, one less vendor, right?

Not quite. The headline numbers share digits, not a currency, and once you look past the sticker price at what a hosting reseller or MSP actually needs from an email product, a per-client billing path, room to grow a mailbox's storage without switching products, and a tool built for selling to someone else's clients, Email Pro and Atriomail turn out to be built for different jobs. This post works through what OVHcloud's own pricing and documentation say, converted into US dollars, and where that leaves a reseller billing 20 to 200 client domains.

Table of Contents

Key Takeaways

Point Details
The £1.39 price isn't a $1.39 price OVHcloud's Email Pro lists at £1.39 ex. VAT per account per month. Converted at the October 2026 GBP/USD rate (about 1.32), that's roughly $1.84, about 32% more than Atriomail's $1.39.
15 GB is a hard ceiling on Email Pro Going past it means switching products entirely, to OVHcloud's separate Hosted Exchange line starting at $4.89/month/account. Atriomail adds 5 GB blocks at $0.60 each, up to 100 GB, on the same mailbox.
No WHMCS or Blesta module for Email Pro OVHcloud's reseller and partner programs cover domains and bundled hosting packages, not a per-client Email Pro billing plugin. Atriomail ships a WHMCS module (tested end to end against the live platform) and a separate Blesta module, plus a REST API.
On a 200-mailbox book, the gap compounds Reselling at $5/mailbox nets about $722/month on Atriomail versus roughly $632/month buying Email Pro at OVHcloud's own listed rate, before card fees, support time and any white-label fee.

See the real margin on your own client book. Atriomail's wholesale price is $1.39 per mailbox, quoted in US dollars, with no currency conversion and no VAT line to explain to a client.

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What OVHcloud Email Pro Actually Costs a Reseller

OVHcloud prices Email Pro per account, not per reseller tier. On OVHcloud's UK site, that's £1.39 ex. VAT (£1.67 inc. VAT) per account per month, with 15 GB of storage per mailbox (ovhcloud.com/en-gb/emails/email-pro/, checked October 2026). On OVHcloud's Ireland site, the same product lists at €1.59 ex. VAT per account per month (ovhcloud.com/en-ie/emails/email-pro/, checked October 2026). Neither page is denominated in US dollars, and neither mentions a lower rate for buying in volume or reselling the mailboxes to your own clients.

Converted at the GBP/USD rate on October 5, 2026 (1.3224, tradingeconomics.com, checked October 2026), £1.39 works out to roughly $1.84 per mailbox per month, about 32% more than Atriomail's $1.39. That gap is pure currency, not a feature you're paying extra for, but it matters the moment you try to put a per-mailbox cost on a US client's invoice: there's no published wholesale rate to fall back on, so a reseller buying Email Pro pays the same retail price as a single-mailbox customer.

OVHcloud does run reseller and partner programs, just not ones built around per-mailbox Email Pro billing. Its web hosting reseller track bundles up to 1,000 email addresses into a hosting package rather than billing them individually (ovhcloud.com/asia/web-hosting/hosting-reseller/, checked October 2026), and its domain name reseller program is about discounted domain registrations, not mailbox pricing (ovhcloud.com/en/domains/vip-domain/, checked October 2026). If what you actually want to sell is mailboxes, as their own line item, at a price you set, Email Pro's own page is the price both you and your client are stuck with.

Atriomail's $1.39 per mailbox is built the other way around: it's a published wholesale price specifically so a reseller can set their own resale number on top of it, the way usage-based email pricing is meant to work. That's also the core difference between reseller email hosting as a category and a single-account product like Email Pro: there's no currency to convert for a US client and no VAT line to add to an invoice, and the same $1.39 applies whether you're billing two mailboxes or two hundred.

The 15 GB Ceiling and the Jump to Hosted Exchange

Email Pro's storage is a flat 15 GB per account, full stop (ovhcloud.com/en-gb/emails/email-pro/, checked October 2026; OVHcloud's own documentation confirms the product's capacity was recently aligned from 10 GB to 15 GB across its pages, github.com/ovh/ovhcloud-docs pull request #816, checked October 2026). There's no option inside Email Pro to add a storage block to one client's mailbox because they're a heavier sender. The only documented path past 15 GB is switching that account to a different OVHcloud product line entirely, Hosted Exchange, which starts at $4.89/month/account and runs from 50 GB up to 300 GB with an extension option (ovhcloud.com/en/emails/hosted-exchange/, checked October 2026).

For a reseller managing a 20 to 200 domain book, that matters in practice: one client's finance lead who needs more room means re-provisioning that mailbox onto a different product, with a different price and a different feature set, rather than just bumping a storage number.

Atriomail keeps every mailbox on the same product. Each one includes 15 GB, and extra room is sold in 5 GB blocks at $0.60 per block per month, with a 100 GB panel maximum, all on the same mailbox a client is already using. A 25 GB mailbox is $2.59 a month total; a 50 GB one is $5.59. Setting those limits is part of the same bulk domain and mailbox workflow a reseller already uses to onboard a client's book, not a separate migration to a bigger product, and the domain's other settings in domain management and branding stay untouched either way.

No WHMCS Module, No Blesta Module, No Client Billing Path

Searching OVHcloud's own site, its partner directory and its GitHub organization turns up no WHMCS or Blesta provisioning module for Email Pro (checked October 2026). OVHcloud bills Email Pro accounts directly, through its own control panel and its own invoice. A reseller who wants those mailboxes to show up as a line item on a client's existing WHMCS or Blesta invoice, next to their hosting or domain charges, has to add that line manually and reconcile it themselves every billing cycle; nothing connects an OVHcloud order to either billing platform automatically.

Atriomail ships a WHMCS provisioning module, tested end to end against the live platform, and a separate Blesta provisioning module, both downloaded from the Plugins page in the Atriomail control panel (search "AtrioMail" on the WHMCS Marketplace for the WHMCS listing). Either one creates the client's Atriomail account and domain when the order comes in and lets the client manage mailboxes, aliases and a catch-all from inside the billing portal they already use, the kind of billing integration this audience is actually trying to buy when they look at a per-mailbox product. There's also a REST API, authenticated with an API key in the X-API-KEY header, for resellers who bill through something other than WHMCS or Blesta, and it's the same account-level branding a reseller sets up in white-label email for agencies that follows those mailboxes once they're billed.

Atriomail admin panel billing screen showing itemized per-mailbox and storage charges

Atriomail's real billing screen, itemizing what Atriomail bills you each month. Your clients are billed separately, at your prices, through the WHMCS or Blesta module.

OVHcloud Email Pro vs Atriomail for Resellers

Put side by side, the two products agree on more than the price tag suggests. Both automate DNS only inside their own ecosystem, Atriomail through a connected Cloudflare or Namecheap account, OVHcloud through its own control panel, and both leave every other DNS host to a manual copy-paste. The real differences show up in storage, billing and support.

Dimension OVHcloud Email Pro Atriomail
Price per mailbox £1.39 ex. VAT (~$1.84 USD, Oct 2026 rate) $1.39 USD
Storage included 15 GB, fixed 15 GB, expandable on the same mailbox
Extra storage None within Email Pro; upgrade to Hosted Exchange ($4.89+/mo, 50-300 GB) $0.60 per 5 GB block, up to 100 GB
Migration tool Mail Migrator: Exchange 2007+, Gmail, Yahoo, IMAP, POP or Zimbra as source IMAP password migration: typical hosting mail, Gmail/Workspace and Yahoo/iCloud with app passwords; cannot sign in to Microsoft 365, Exchange Online or Outlook.com
DNS setup Automatic only for domains managed in OVHcloud's own panel; manual MX/CNAME elsewhere Automatic only on connected Cloudflare and Namecheap accounts; DNS Setup dialog elsewhere
Reseller billing integration No WHMCS or Blesta module found for Email Pro WHMCS and Blesta provisioning modules, plus a REST API
White-label branding No documented option to put a reseller's own name on the panel or webmail Paid add-on: your product name and favicon on your own hostname
Uptime SLA / backups 99.99% SLA; daily backups retained 14 days No uptime SLA or percentage published
Support hours Monday to Friday, 9am to 6pm Business hours, not round the clock
Contract / minimum No stated minimum; monthly or yearly billing with pro-rata date alignment No minimum, no contract, monthly billing, no proration

When OVHcloud Makes Sense

  • Your agency already runs hosting, VPS or dedicated servers on OVHcloud and would rather keep everything on one invoice from one vendor, even without a per-client margin on the mailboxes themselves.
  • A client is migrating off an on-premises Exchange server, Zimbra, or a mix of Gmail and Yahoo accounts, and you want one native tool that pulls from any of those sources, including calendars and contacts, in a single pass. Atriomail's own step-by-step migration playbook covers IMAP sources only, so a book that's mostly ex-Exchange mailboxes is the clearest case for OVHcloud's broader tool.
  • You need a published uptime SLA and a stated backup retention window to point to in a contract. OVHcloud states 99.99% and 14 days; Atriomail does not publish either.
  • The client's mailbox count is small, or already bundled into a wider OVHcloud hosting package, so the lack of a reseller rate on Email Pro itself doesn't change the math much.

Moving a client's book off OVHcloud, or anywhere else? Atriomail's IMAP migration copies mail and folders into a new mailbox at no extra charge. A book of 50 or more mailboxes is worth planning with us before you start.

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Where Atriomail Fits

Put both products against the same 200-mailbox client book and the comparison stops being about currency symbols. Atriomail's wholesale cost is 200 × $1.39 = $278/month. Resold at $5/mailbox, that's $1,000/month in revenue and about $722/month in margin, before card fees, support time and any white-label fee. Buying the same 200 mailboxes from OVHcloud at Email Pro's own listed rate, since no reseller discount is published for the product, converts to roughly 200 × $1.84 = $368/month at the October 2026 exchange rate. Sold at the same $5/mailbox to keep the comparison fair, that's the same $1,000/month in revenue and about $632/month in margin, before the same card fees, support time and any white-label fee: about $90 a month, or roughly $1,080 a year, less than the Atriomail number on an identical book.

OVHcloud Email Pro (converted to USD) $632/mo Atriomail ($1.39/mailbox) $722/mo $0 $200 $400 $600 $800
Monthly recurring margin on a 200-mailbox client book resold at $5/mailbox. Full numbers in the text above.

That gap alone probably won't move a reseller who has already standardized their hosting stack on OVHcloud and values one vendor and one invoice over a few hundred dollars a year. But if the actual job is billing client mailboxes as their own line item, on a schedule you control, with a provisioning module into WHMCS or Blesta and room to grow a mailbox's storage without re-provisioning it onto a different product, Atriomail is built for exactly that job and OVHcloud's Email Pro page is not. Run your own client book through the numbers on Atriomail's pricing page before deciding either way, and if the support process matters as much as the margin, the reseller support process is worth reading alongside it.

Run your own 200-mailbox book through the numbers. Atriomail's pricing page uses the same $1.39 wholesale price and your resale number, not a converted estimate.

See pricing   Create your account

Frequently Asked Questions

Is OVHcloud Email Pro really the same price as Atriomail?

No. The digits match, £1.39 versus $1.39, but the currencies don't. Converted to US dollars at the October 2026 exchange rate, OVHcloud's Email Pro works out to roughly $1.84 per mailbox, about 32% more than Atriomail's $1.39.

Can I migrate a client off Microsoft 365 or Exchange Online into Atriomail?

Not with the built-in migration tool. Microsoft no longer allows password sign-in over IMAP, so moving a Microsoft 365 tenant needs a different route; talk to us before you quote it. The tool does work for typical hosting mail, and for Gmail, Google Workspace, Yahoo and iCloud with an app password.

Can I bill Atriomail mailboxes through WHMCS or Blesta?

Yes. Atriomail has a WHMCS provisioning module, tested end to end against the live platform, and a separate Blesta provisioning module, both downloaded from the Plugins page in the Atriomail control panel, each creating the client's Atriomail account and domain when the order comes in and billing mailboxes and storage on the client's own invoice.

Does OVHcloud Email Pro offer white-label branding for my agency?

Nothing documented on OVHcloud's own pages describes putting a reseller's own name, logo or hostname on the Email Pro control panel or webmail. Atriomail's white-label add-on, a paid add-on with a one-time setup fee plus a monthly fee, puts your product name and favicon on your own control panel hostname once it's set up.

What happens when an OVHcloud Email Pro mailbox needs more than 15 GB?

Based on OVHcloud's own documentation, there's no storage add-on inside Email Pro; the account has to move to OVHcloud's separate Hosted Exchange product, which starts at $4.89/month/account for 50 GB. Atriomail instead adds 5 GB blocks at $0.60 each, up to 100 GB, to the same mailbox.

Does Atriomail offer an uptime SLA like OVHcloud's 99.99%?

No. Atriomail does not publish an uptime SLA or percentage. If a published SLA is something you need to show a client in writing, OVHcloud's stated 99.99% is a genuine point in its favor.

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