MailDeck
Managed cold email infrastructure across Microsoft 365, Google Workspace and private SMTP: inboxes, DNS and warmup, not a sequencer.
From $30/domain/mo
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Bottom line
Cold email infrastructure with Outlook tenants, Google Workspace, and SMTP. Outlook Normal is $30/domain/mo for 100 inboxes.
Stands out for: One US Microsoft tenant holds 100 Outlook inboxes, so 1,000 inboxes is 10 domains at the tenant rate.
Watch out for: Sale rates sit under a higher regular rate. Google extra mailboxes cost $2.99 to $3.50 each. SMTP is a different stack.
Overview
MailDeck sells managed cold email inboxes across Microsoft Outlook, Google Workspace, private SMTP, and mixed stacks. Outlook Normal is $30 per domain per month for 100 inboxes, marked down from $45, with 4 to 5 cold sends per inbox per day. Premium is $40 per domain for 8 to 10 sends. Mixed is $35. Google Workspace Starter is $39 per month for 10 mailbox slots and 2 domains. Private SMTP is $0.50 per inbox.
Agencies pick MailDeck to buy inbox capacity in tenant blocks instead of paying per mailbox at Google rates. Growth Google is $99 per month for 30 slots. Enterprise Google is $299 per month for 100 slots. Diversified stacks start at $99 per month. Google plans include API access and webhooks. Outlook cards list 15-plus sending-tool connections. There is no published free trial.
Who it's for
Best for
- Agencies buying Outlook inboxes by the hundred
- High-volume senders mixing Outlook, Google, and SMTP
- Teams that want setup and domain replacement included
- Operators who need many mailboxes per domain
Not ideal for
- Buyers who want one mailbox without a 100-inbox tenant
- Teams that only need a sequencer, not inboxes
Key features
Multi-provider infra. Microsoft 365 Outlook tenants, Google Workspace and private SMTP under one provider. Not a sequencer; connects via SMTP to Instantly, Smartlead, Lemlist, Apollo and others.
Turnkey DNS & auth. SPF, DKIM and DMARC configured per domain; provisioning marketed at 48–72 hours for Outlook, faster for Google/SMTP.
Warmup & replacement. Included warmup or pre-warmed Outlook tenants; free domain replacement under normal burn conditions; US/EU IP positioning marketed.
Volume economics. Outlook at ~100 inboxes per domain with published per-inbox send limits; Diversified Stack bundles mix Outlook/SMTP/Google for resilience.
Pricing
| Plan | Price | What you get |
|---|---|---|
| Outlook Normal | $30/domain/mo | 100 inboxes; regular $45 |
| Outlook Premium | $40/domain/mo | Regular $55 |
| Google Workspace Starter | $39/mo | 10 slots |
| Google Workspace Growth | $99/mo | |
| Google Workspace Enterprise | $299/mo |
Outlook Normal is $30/domain/mo for 100 inboxes (regular $45). Premium is $40 (regular $55). Mixed is $35. Google Workspace Starter is $39/mo for 10 slots, Growth $99/mo, Enterprise $299/mo. Private SMTP is $0.50/inbox. Diversified Starter is $99/mo. Extra Google mailboxes are $2.99-$3.50. Confirm current terms on the vendor site.
Checked 19 Sep 2026. Vendors change prices without notice.
Is MailDeck expensive?
MailDeck starts at $30/domain/mo. We list 29 deliverability tools in total. 3 have a free tier, and those with a public price typically start around $15 a month.
- 0 quote-based
- 3 free tier
- 28 public price
Worked out automatically from every deliverability listing, so it updates as the directory changes.
Pros and cons
Pros
- $30/domain/mo for 100 Outlook inboxes
- Google, Outlook, and SMTP on one vendor
- Google plans include API and webhooks
Cons
- Outlook sold in 100-inbox tenants
- Sale price sits under a higher regular rate
- No published free trial
How MailDeck compares
See all MailDeck alternatives, with what each one does differently and a head to head for every pairing.
| Tool | Free tier | From | MCP | API | Compare |
|---|---|---|---|---|---|
| | – | $30/domain/mo | – | ✓ | |
| | – | $75/mo | ✓ | ✓ | Compare |
| | – | $3/mailbox/mo | – | – | Compare |
| | – | $3.50/mailbox/mo | ✓ | ✓ | Compare |
| | – | $4/mailbox/mo | – | ✓ | Compare |
$75/mo MCP API
Google Workspace inboxes if you want per-mailbox Google infra.
$3/mailbox/mo
Done-for-you domains and inboxes with a different rate card.
$3.50/mailbox/mo MCP API
Lower-cost inboxes if tenant blocks are more than you need.
$4/mailbox/mo API
Inbox infra billed per mailbox on yearly plans.