If you're setting up cold email infrastructure, the tool you pick will affect deliverability, scalability, and how much control you actually have.
Mailforge, Infraforge, and Primeforge all let you create domains and mailboxes. The difference is how that infrastructure is built.
The core difference
Primeforge: Google Workspace and Microsoft mailboxes
Infraforge: SMTP/IMAP infrastructure with dedicated IPs
Mailforge: SMTP/IMAP infrastructure with shared IPs
Everything else comes down to tradeoffs between cost, control, and deliverability.
Primeforge
Real reseller Google Workspace and Microsoft 365 mailboxes, configured for cold outreach.
Send from the same providers your prospects use
Higher inbox placement through ESP matching
Pre-warmed mailboxes available
Automated setup with DNS handled for you
Stable, predictable deliverability
Best fit:
Agencies and sales teams
High-value outbound campaigns
Anyone prioritizing reliability over cost
Limitations:
Higher price point
Less control over infrastructure
Infraforge
Private email infrastructure with dedicated IP addresses.
Full control over sending reputation
No shared IP risk
Pre-warmed mailboxes available
Automated DNS and setup
Best fit:
Agencies and advanced users
High-volume outbound
Teams that want control and flexibility
Limitations:
Requires understanding of deliverability
Mistakes can impact performance faster
Mailforge
Shared infrastructure built specifically for cold email.
Lowest cost per mailbox
Fast setup in minutes
Automated DNS configuration
No technical overhead
Works with any sending tool
Best fit:
Beginners
Small teams
Testing and early-stage outbound
Limitations:
No pre-warmed mailboxes
Shared IP reputation
Less control at scale
Deliverability
Primeforge: strongest baseline due to Google and Microsoft infrastructure
Infraforge: high ceiling, depends on how well you manage it
Mailforge: solid but can depend on other users activity due to shared IP infrastructure
Cost
Mailforge: lowest
Infraforge: mid-range
Primeforge: highest
Ease of Use
Mailforge: easiest to start
Infraforge: simple setup, more involvement over time
Primeforge: straightforward, but tied to Google and Microsoft environments
When to choose each
Mailforge: starting out or keeping costs low
Infraforge: scaling with control
Primeforge: maximizing deliverability and stability
You don’t have to choose just one
One common mistake is treating these options as mutually exclusive.
In reality, the best-performing outbound setups use a mix of infrastructure.
Different providers behave differently when it comes to deliverability. Relying on a single system increases risk and limits your ability to scale safely.
A more effective approach is to diversify.
Use Primeforge for Google Workspace and Microsoft mailboxes
Use Infraforge or Mailforge for SMTP/IMAP infrastructure
This gives you two key advantages:
Access to high-trust ecosystems like Google and Microsoft
Additional sending capacity through dedicated or shared SMTP infrastructure
In practice, this means:
Primeforge handles deliverability-focused sending
Infraforge and/or Mailforge supports volume and scaling
Most advanced teams move in this direction once they start scaling.
Final takeaway
Mailforge: simple and affordable
Infraforge: powerful and flexible
Primeforge: stable and deliverability-focused
The right choice depends on how much you value cost, control, and consistency.