InfraForge Pricing 2026: Mailbox Slots, Dedicated IPs & Real Cost

InfraForge's commercial model has four defining rules:

• You pay for slots, not active mailboxes. A mailbox slot lets you delete and recreate mailboxes freely without extra charge — you're billed on slot count, not how many are live at any moment. Minimum buy-in is 10 slots.
• Volume and billing term set your rate. The per-mailbox price falls as you buy more slots, and annual billing knocks roughly 17% off the quarterly rate. The published range runs from $4 (quarterly, small) down to ~$2.50 (bulk).
• It's private infrastructure, not Google/Microsoft. InfraForge provides dedicated, private email infrastructure (SMTP-style) with optional dedicated IPs. If you specifically want Google Workspace or Microsoft 365 mailboxes, InfraForge itself directs you to its sister product, Primeforge.
• The IP is an add-on. Dedicated IPs — the whole point of "private" infrastructure for many buyers — are not bundled. They're $99/month each.

There's no free trial, no required contract, and InfraForge can issue invoices for teams that need them.

Example from InfraForge's own calculator: 25 mailboxes works out to ~$83/month on annual billing or ~$100/month billed quarterly, plus domains (e.g. 8 .com domains = $112/year). Rates are from the InfraForge pricing calculator.

Included free with every subscription: automated DNS setup, expert support, inbox hosting and maintenance, and full API access.

InfraForge is built for teams that want control over their sending environment:

• Private infrastructure with the option of dedicated IPs for full reputation isolation.
• Slot-based flexibility — recreate mailboxes without paying again, useful when you rotate or refresh accounts.
• Workspaces for organizing mailboxes by client or campaign (a frequently praised feature for agencies).
• Automated DNS, API access, and hosting included in the base price.
• Salesforge stack integration — pairs with Salesforge (sequencing) and slots into a broader outbound toolchain.

The trade-off is what "private infrastructure" means: these aren't Google or Microsoft mailboxes. Dedicated IPs give you isolation, but they have to be warmed and sustained to perform — a cold dedicated IP at low volume can underperform a well-run shared Google setup.

The headline rate is only the start. Here's how it actually adds up:

• Mailboxes only: 25 slots on annual billing ≈ $83/month, plus ~8 domains at $14/year (≈$9/month amortized) = ~$92/month, or ~$3.68/mailbox all-in.
• Add one dedicated IP: +$99/month nearly doubles the cost of a 25-mailbox setup, pushing the effective per-mailbox cost to ~$7.60. Dedicated IPs only make economic sense once you're sending enough volume per IP (roughly 1,000+/day) to justify and warm them.
• At bulk: the $2.50/mailbox tier is genuinely competitive, but it assumes high slot counts, and dedicated IPs remain a separate per-IP line.

The honest read: InfraForge's mailbox pricing is reasonable, but the dedicated-IP add-on is the variable that determines whether it's cheap or expensive. Buyers who add IPs without the volume to use them overpay significantly.

Five things to weigh:

1. 1Dedicated IPs are $99/month each. This is the cost competitors most often flag. Safe scaling with multiple dedicated IPs gets expensive fast, and IPs need sustained volume to build reputation — otherwise you're paying for isolation you can't fully use.
2. 2It's not Google or Microsoft. InfraForge is private SMTP-style infrastructure. For mainstream Google/Microsoft mailboxes, InfraForge routes you to Primeforge — a different product and price.
3. 3Minimum 10 mailbox slots. No single-mailbox or tiny plans; the floor is 10 slots.
4. 4Add-ons stack up. SSL/domain masking ($2/domain/mo) and Masterbox ($7–9/workspace/mo) are useful but billed separately on top of mailboxes, domains, and IPs.
5. 5No free trial. You evaluate by subscribing. There is a yearly discount and no contract lock-in, but no free testing tier.

The honest positioning: InfraForge is a strong pick if you specifically want private infrastructure with optional dedicated IPs and you live in the Salesforge ecosystem — the slot model and workspaces are well-built, and support gets consistent praise. The catch is the $99/IP add-on and the fact that you're buying private SMTP-style infrastructure rather than official Google/Microsoft accounts. InboxKit takes a different approach: official Google Workspace, Microsoft 365, and Azure mailboxes on premium US-IP infrastructure (no separate per-IP surcharge), full admin panels, and always-on InfraGuard monitoring built in — at a comparable $2.50–$3.50 per-mailbox range. If isolation is your goal, InboxKit delivers it through dedicated per-domain panels and US IPs rather than a $99/month dedicated-IP line item.

InfraForge makes sense for high-volume senders and agencies who want private infrastructure with the option of fully isolated dedicated IPs, and who are already using (or plan to use) the Salesforge stack. If you send enough per IP to justify the $99/month, value slot-based flexibility, and want workspaces to organize client books, the pricing is fair and the control is real. It's a particularly clean fit for teams that have a clear reason to want dedicated IPs and the volume to keep them warm.

InfraForge is harder to justify when:

• You want Google or Microsoft mailboxes. InfraForge is private SMTP-style infrastructure; for official Google/Microsoft accounts you'd use Primeforge or a provider like InboxKit that specializes in official Google/MS365/Azure mailboxes.
• You can't keep dedicated IPs warm. At low-to-moderate volume, the $99/IP add-on buys isolation you can't fully use — a well-run shared setup may deliver better.
• You want monitoring bundled. InfraForge includes hosting and DNS, but always-on blacklist/DNS/bounce monitoring with alerting (like InboxKit's InfraGuard) is a different value layer.
• You need a free trial or tiny plan. No free trial and a 10-slot minimum make casual evaluation harder.

InfraForge's pricing is transparent through its calculator, and the slot-based model is genuinely flexible for teams that rotate mailboxes. At $2.50–$4 per mailbox plus cheap-ish domains, the core infrastructure is fairly priced, and the included DNS automation, hosting, and API access add real value. For Salesforge-stack agencies that want private infrastructure and a clear path to dedicated IPs, it's a solid, well-supported choice.

The decision hinges on two things: whether you actually need dedicated IPs (at $99/month each, they only pay off at sustained volume), and whether private SMTP-style infrastructure fits — versus official Google/Microsoft mailboxes. If you want official Google Workspace, Microsoft 365, or Azure mailboxes on US IPs with monitoring built in and no per-IP surcharge, at a comparable per-mailbox price, see how InboxKit compares.