Shared IP pools vs. dedicated infrastructure — which setup protects your deliverability.
Cold email infrastructure is the unsexy foundation that determines whether your campaigns land in inboxes or spam. Mailforge and Infraforge both solve the same problem — getting you sending-ready mailboxes — but they take fundamentally different approaches. Mailforge runs shared IP pools at roughly $3/mailbox/month. Infraforge gives you dedicated IPs with more control, at a higher price. The right choice depends on your volume, your tolerance for shared-infrastructure risk, and how much you want to manage yourself.
Shared IPs vs. dedicated IPs
Mailforge pools your sending across shared IPs with other users. This means your deliverability is partially dependent on your neighbors' behavior. If someone on your shared IP blasts 10,000 cold emails in a day, your reputation takes a hit too. Infraforge gives you dedicated IPs that only carry your traffic. Your reputation is yours alone — good or bad.
Price and speed of setup
Mailforge is the fastest and cheapest way to get sending infrastructure live. At ~$3/mailbox/month, you can spin up 20-30 mailboxes for under $100/month and start warmup immediately. Infraforge costs more per mailbox — typically $5-8 depending on configuration — but the dedicated infrastructure means you are not sharing risk with strangers. For teams sending under 500 emails/day, Mailforge's price is hard to beat. Above that, Infraforge's isolation starts to matter.
Deliverability control
With Mailforge, you are trusting their IP pool management. They rotate IPs and manage reputation at the pool level, but you have limited visibility into what is happening on your shared IPs. Infraforge gives you full control — you can monitor your IP reputation directly, manage warmup more precisely, and isolate problem domains without affecting your other mailboxes. For agencies and high-volume senders, this control is worth the premium.
| Mailforge | Infraforge | |
|---|---|---|
| IP infrastructure | Shared IP pools | Dedicated IPs per customer |
| Price per mailbox | ~$3/month | $5–8/month depending on config |
| Setup speed | Minutes — instant provisioning | Slightly longer — dedicated IP assignment |
| Warmup | Built-in, automated | Built-in, more granular control |
| Deliverability risk | Shared — neighbor behavior affects you | Isolated — your reputation is yours |
| Best volume range | Under 500 emails/day | 500+ emails/day |
| IP reputation visibility | Limited — pool-level | Full — per-IP monitoring |
| Best for | Small teams, low volume, budget-conscious | Agencies, high volume, deliverability-critical |
The verdict
For teams sending under 500 cold emails per day with a tight budget, Mailforge is the practical choice. The shared IP risk is real but manageable at low volumes. For agencies managing multiple client campaigns or anyone sending 500+ emails daily, Infraforge's dedicated IPs are worth the extra cost. Shared infrastructure is fine until it is not — and when a shared IP gets burned, you have no recourse. If your outbound is a core revenue channel, pay for dedicated infrastructure.
Can my deliverability get hurt by other users on Mailforge?
Yes. Shared IP pools mean your sender reputation is partially tied to other users on the same IPs. If a neighbor sends spam or gets high bounce rates, the IP reputation drops for everyone. Mailforge manages this by rotating IPs, but the risk is inherent to shared infrastructure.
Is Infraforge worth the higher price for a small team?
Probably not if you are sending under 200 emails per day. At that volume, Mailforge's shared IPs are fine and the cost savings are significant. Once you cross 500 emails/day or start running campaigns for multiple clients, Infraforge's isolation pays for itself in avoided deliverability problems.
What about Maildoso as an alternative?
Maildoso sits between Mailforge and Infraforge — shared infrastructure but with better IP rotation and monitoring. It is a reasonable middle ground. For pure cost optimization, Mailforge wins. For pure deliverability control, Infraforge wins. Maildoso tries to split the difference.
How many mailboxes do I need for cold email?
A common setup is 3-5 sending mailboxes per domain, with each mailbox sending 30-40 emails per day. For 500 emails/day, you need roughly 15 mailboxes across 3-5 domains. Both Mailforge and Infraforge support this, but the total monthly cost differs significantly at scale.
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