Inbox providers · tied for 22nd of 52 · 2026
sending.ac pricing and review
sending.ac · Google & Microsoft inbox reseller · founded 2024 · legal entity: Scale with Value Limited · Visit site ↗
- Deliverability21/27
- Inbox choice8/16
- Sending6/15
- API & AI7/7
- Buying terms10/10
- Setup cost2/25
Why it ranks here
Sells Microsoft 365 inboxes. Inboxes arrive pre-warmed, so you can start sending sooner. Deliverability: automatic SPF/DKIM/DMARC, inbox placement tests, replacement of burned inboxes and dedicated IPs. It has a public API and an official MCP server for automation. Agencies get client workspaces or a white-label option.
Key features
- Automatic SPF/DKIM/DMARC
- Inbox placement tests
- Replacement of burned inboxes
- Microsoft 365 inboxes
- Dedicated IPs
Best for
Agencies that run inboxes for several clients.
Pricing
- Per inbox
- $0.57
- At volume
- $0.50
- Minimum order
- 350 inboxes
- Cheapest plan
- $199/mo
Monthly billing. Pricing page ↗ · checked Oct 31, 2026
Scorecard
| DeliverabilityWhat protects sender reputation without extra tools or subscriptions. | 21/27 | ||
|---|---|---|---|
| Inbox choiceWhich types of inboxes and domains you can get in one place. | 8/16 | ||
| Sending and workflowWhether you can run and manage campaigns without another tool. | 6/15 | ||
| API and AI agentsHow easy it is to automate the setup from code or an AI assistant. | 7/7 | ||
| Buying termsHow much you risk before you know it works. | 10/10 | ||
| Cost of a working setupWhat 30 inboxes plus warm-up and a sequencer cost per month — the cheaper, the more points. | 2/25 | ||
| Total | 54/100 | 18 of 20 conditions checked |
The evidence
Every condition, what the vendor's own site says, and where.
| Deliverability | |||
|---|---|---|---|
| Ongoing warm-up included in the priceNot found on site | 0/6 | ||
Pre-warmed inboxesConfirmedThey arrive with sending history already on them, so there’s no warm-up window to sit through. | source ↗ | 2/2 | |
Automatic SPF, DKIM and DMARC setupConfirmedAutomatic DNS setup SPF, DKIM and DMARC, written per domain and verified before the first send. | source ↗ | 5/5 | |
Inbox placement or spam testsConfirmedPlacement, not a proxy. Microsoft spam score and actual inbox placement, checked daily. | source ↗ | 5/5 | |
Replacement of burned inboxes or domainsConfirmedFree mailbox insurance ... Full replacement within 30 days. Even on mailboxes you buy somewhere else. | source ↗ | 5/5 | |
Dedicated IP optionConfirmedIsolated tenant Your own IPs, your own reputation, your own admin panel per domain. Never pooled. | source ↗ | 4/4 | |
| Inbox choice | |||
Google Workspace inboxesNot offeredCan I mix Google and Azure mailboxes? Not yet. Google mailboxes are on a waitlist for now, so every plan runs on Azure. | source ↗ | 0/5 | |
Microsoft 365 / Outlook inboxesConfirmed350 Azure inboxes | source ↗ | 5/5 | |
Private SMTP/IMAP inboxesNot offeredCan I mix Google and Azure mailboxes? Not yet. Google mailboxes are on a waitlist for now, so every plan runs on Azure. | source ↗ | 0/3 | |
Domain purchase inside the productConfirmedDomains, bought and isolated Any TLD, DNS written and verified, one tenant per domain. | source ↗ | 3/3 | |
| Sending and workflow | |||
Built-in campaign sequencerNot offeredSending.ac does not itself provide campaign sequencing. | source ↗ | 0/5 | |
| Unified inbox for repliesNot found on site | 0/4 | ||
Export to other sending toolsConfirmedsending.ac mailboxes connect to Smartlead natively, reconnect on their own and get replaced when one burns, so the volume your campaigns plan for keeps going out. | source ↗ | 4/4 | |
Multi-client workspaces or white-labelConfirmedA workspace per client, one view for you. Their mailboxes, their domains, their risk levels, walled off from everyone else. | source ↗ | 2/2 | |
| API and AI agents | |||
Public APIConfirmedAn API for everything, with an MCP server on top. Point an agent at your account and it provisions the infrastructure while you write the campaign. | source ↗ | 4/4 | |
Official MCP serverConfirmedMCP server ready An API for everything, with an MCP server on top. | source ↗ | 3/3 | |
| Buying terms | |||
Prices published on the siteConfirmedGrowth Prewarmed $199 / mo billed monthly 350 Azure inboxes | source ↗ | 4/4 | |
Free plan, free trial or money-back guaranteeConfirmedMailboxes you buy anywhere else can be connected for free. The warm-up pool check and the deliverability clones both run on outside infrastructure. You only pay for what you provision through us. | source ↗ | 4/4 | |
Monthly billing availableConfirmedMonthly Quarterly Yearly 2 months free on yearly billing | source ↗ | 2/2 | |
| Cost of a working setup | |||
Cost of a working setup (30 inboxes)Calculated350 inboxes × $0.57 = $200 + $97 — Instantly Hypergrowth for warm-up and sending (the inbox price includes neither) = $296/month | how ↗ | 2/25 | |
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Where we checked
Only the vendor's own public pages. We do not use third-party reviews or ratings. Something wrong? Send a correction.
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