Cold outreach that puts deliverability first
Deliverability-first email infrastructure for cold outreach
InfraBoxes runs your cold outreach on private servers, aged IPs, and smart warmup, so you keep inbox placement high while paying $3 per private mailbox or $2.5 per Google mailbox instead of $8+ per seat.
From $3 per private mailbox
Dedicated infra with warmup baked in
From $2.5 per Google mailbox
Connect your seats without $8+ pricing
SPF, DKIM, DMARC auto-configured
Every domain set up and monitored
Inbox placement first
Warmup, aged IPs, and burn protection
Who it’s for
Who is InfraBoxes for?
InfraBoxes is built for teams that care more about inbox placement and cost per mailbox than fancy dashboards.
How InfraBoxes compares
See how InfraBoxes stacks against other cold email infrastructure tools built for outbound teams.
| Features | Infraforge (InfraBoxes) | Primeforge | Zapmail | Hypertide | Mailforge | Inframail | Maildoso |
|---|---|---|---|---|---|---|---|
| IP Model | Dedicated private stacks (aged IPs, domain isolation) | Shared + enhanced domain scoring | Shared Google/Microsoft infra | Fully shared pool | Shared IP pools | Mix of dedicated + shared | Shared pools |
| Domain Control | Full control (clear mapping: domain → mailbox → IP) | Medium (managed inside system) | Limited (mailbox seat model) | Low | Medium (managed automatically) | Medium–High (technical setup) | Low |
| Deliverability Stability | 95%+ on healthy domains (bounce filtering, burn alerts) | High (domain intelligence) | Moderate (pre-warmed inboxes) | Unstable (pool variations) | Good for shared infra | DIY-dependent | Pool-dependent |
| Warmup & Protection | Smart warmup, burn alerts, placement testing | Automated domain scoring, blacklist alerts | Pre-warmed inboxes | Basic shared warmup | Shared warmup, basic alerts | DIY warmup depending on setup | Basic warmup |
| DNS Automation | Auto SPF, DKIM, DMARC | Domain checks | Partial | No | Yes (automated) | Manual | No |
| Bulk Mailbox Setup | AI-assisted bulk mailbox creation | Limited | Pre-warmed mailboxes only | No | Yes | Manual/technical | No |
| Setup Time | 10–12 minutes | 20–30 minutes | 10 minutes | 4–6 hours | 10–15 minutes | 1–3 hours | 30–60 minutes |
| Cost for 30 Mailboxes | $90 (private) / $75 (Google) | ~$150–$240 | ~$75–$90 | ~$60–$75 | ~$120–$180 | ~$150–$250 | ~$45–$75 |
| Cost for 100 Mailboxes | $300 (private) / $250 (Google) | ~$400–$700 | ~$250–$300 | ~$200–$250 | ~$350–$600 | ~$500–$900 | ~$150–$250 |
Infraforge (InfraBoxes)
ToolPrimeforge
ToolZapmail
ToolHypertide
ToolMailforge
ToolInframail
ToolMaildoso
ToolDeliverability timeline
How we keep you inbox-ready
Four deliverability gates that stay green so every new batch of domains lands in the inbox at the lowest possible cost per mailbox.
Features
Built for cold outreach deliverability
Private infrastructure, inbox-style controls, and automations tuned for outbound sequences, not newsletters.
Isolation by design
Every 10 domains live on their own dedicated stack—IPs, servers, and safeguards—so one bad sender never drags the rest down. This keeps inbox placement stable even as you add more mailboxes.
Deliverability-first pricing
Stop paying $8+ for standard Google inboxes. With InfraBoxes, you get: - $3 per private mailbox on our dedicated infra - $2.5 per Google mailbox connected through us All with warmup, monitoring, and deliverability controls included.
Domain burn alerts
We track warmup reputation, inbox tests, reply rates, and bounce types to warn you before results drop. Burn alerts trigger when a domain or mailbox crosses risk thresholds.
Cold-email-native automation
Auto-throttling, adaptive send volumes, and bounce filtering are built specifically for cold outreach. No newsletter assumptions, no blast-style sending.
Inbox-style control
Launch, pause, or reroute sends at the mailbox level. Group mailboxes by client, market, or campaign while keeping costs and deliverability visible.
Workflow
Onboard → Protect → Send
Three steps to run cold outreach on cheaper mailboxes without sacrificing inbox placement.
Onboard
Connect domains and mailboxes in clicks. We stage them on aged IPs, align DNS, and start warmup automatically whether you use $3 private mailboxes or $2.5 Google mailboxes.
Protect
Dynamic IP rotation, bounce filtering, and adaptive send volumes keep you out of spam as you scale. We cap new domains automatically so they don’t burn on day one.
Send
Launch campaigns from an inbox-style console with reply health, placement signals, per-domain costs, and burn alerts in one place.
Live reporting
Inbox-ready signals in one view
Give your team a simple deliverability dashboard: inbox placement, replies, domain health, and burn prevention tied back to cost per mailbox.
Inbox placement
95.7%
+3.1% vs last month
Replies
2,184
+21% this cycle
Domain health
Green
All active pools warming safely
Burn alerts
0
Prevention rules are working
Track results per pool and see what you’re paying: $3 private, $2.5 Google per mailbox.
Ready to ship
Launch your InfraBoxes workspace in minutes
Invite your team, connect domains, and add mailboxes at $3 (private) or $2.5 (Google). Every mailbox comes with warmup, monitoring, and burn protection built in, so you can focus on getting replies, not fighting spam filters.
FAQ
Common questions
Everything stays aligned with inbox-first design: simple, obvious, and built for repeat deliveries.
How do you keep deliverability high?
We combine isolated stacks, aged IPs, DNS alignment, and constant warmup monitoring. Our system watches inbox vs spam placement, bounce types, and reply rates. If a domain or mailbox starts to burn, we slow it down and alert you so reputation recovers before you lose deals.
What do the $3 and $2.5 prices include?
$3 per mailbox covers private infrastructure on our dedicated servers, with warmup, monitoring, and deliverability controls included. $2.5 per mailbox covers Google Workspace mailboxes connected through InfraBoxes, also with warmup and monitoring. You pay per mailbox and use them in your existing outreach tools.
Can I plug InfraBoxes into tools like Smartlead or Instantly?
Yes. InfraBoxes is infra-first. You can connect your mailboxes into sequencers like Smartlead, Instantly, Apollo, or your own in-house tools while keeping all deliverability and pricing control inside InfraBoxes.
Is there team-based access?
Yes. Workspaces, roles, and audit logs keep your team aligned. You can invite reviewers, limit who can edit domains or mailboxes, and separate client workspaces if you’re an agency.
How do burn alerts work?
We track warmup reputation, inbox tests, reply rates, bounce types, and send patterns. When metrics cross preset thresholds, we flag the pool, slow volume, and show you which domains or mailboxes are at risk.