Domain warmup is free on Arcinbox. See what is included
GOOD INFRASTRUCTURE. BETTER ECONOMICS.

Your stack. Your starting point.

Straightforward monthly pricing. Choose what works for you.

Microsoft 365

Your Microsoft foundation.

$2.50
per mailbox / monthChoose Microsoft
  • Microsoft mailboxes
  • Per-mailbox monthly pricing
  • Choose your mailbox count

Azure tenant

A tenant-based approach.

$30
per tenant / monthChoose Azure
  • Azure tenant provisioning
  • Per-tenant monthly pricing
  • Confirm capacity at checkout

Custom SMTP

Built around your needs.

Custom
pricing for your setupExplore options
  • SMTP infrastructure
  • Discuss your sending needs
  • Confirm hosting & IP options

Prices in USD. Domain registration and additional services are not included in the mailbox prices shown.
Azure mailbox capacity, licensing, and sending limits depend on the tenant configuration.

A SMALLER BILL ADDS UP.

Do the math.
Keep the difference.

See what $2.50 Google or Microsoft mailboxes could mean for your monthly budget.

Your numbers. A transparent comparison.
No inflated savings claims.

Your mailbox cost calculator

USD / month
1 mailbox1,000 mailboxes
Your current cost$600/mo
With Arcinbox$250/mo
Your potential annual savings$4,200 / year

Mailbox subscription costs only. Excludes domains, taxes, setup, and other services. Your current rate is an editable example.

A LITTLE MORE CLARITY

Good questions.
Straight answers.

Get to know the foundation
behind your next campaign.

Explore Arcinbox
What is Arcinbox?

Arcinbox provides lower-cost Google, Microsoft, Azure, and SMTP email infrastructure. Choose a provider to fit your workflow and budget, then use your sending platform to manage campaigns and replies.

How much do the mailboxes cost?

Google mailboxes are $2.50 per mailbox per month. Microsoft mailboxes are also $2.50 per mailbox per month. Azure is $30 per tenant per month. SMTP pricing depends on your requirements. Check your order for domain charges, setup scope, taxes, and any optional services.

What is the difference between a mailbox and an Azure tenant?

A mailbox is an individual email account. A tenant is an organization-level environment that can contain accounts and services. The $30 Azure price is per tenant, not per mailbox. Confirm the included mailbox count, licenses, sending limits, and receiving support before ordering. Azure Communication Services Email is a sending service and is not the same thing as a Microsoft 365 inbox.

Can I use these accounts with my sending tool?

Connection options depend on the provider and your sending tool: Google and Microsoft commonly use OAuth, while custom mail servers typically use SMTP for sending and IMAP for receiving. Confirm support for your exact tool and authentication method before you order.

Do I still need to warm up new mailboxes?

Yes, and Arcinbox includes domain warmup at no extra cost. New domains and accounts need a gradual, monitored sending ramp. Set up authentication, validate your contacts, and watch bounces and complaints as you increase volume. Automated warm-up is not a guarantee of inbox placement; provider rules and real recipient engagement still matter.

Will buying mailboxes guarantee inbox placement?

No provider can guarantee that every email reaches the inbox. Authentication, domain and IP reputation, recipient engagement, list quality, and sending behavior all affect delivery. Follow your mailbox provider’s sending policies and make it easy for recipients to opt out.

Your stack.
Your starting point.

Pick a provider, choose your mailbox count, and get started.

Get started