Do I need dedicated IPs for cold email?

Not always. Teams sending under 50,000 emails per month can succeed with shared IPs and good warmup practices through SendKit. Above that volume, dedicated IPs provide important reputation protection.

Can I start with Maildoso and switch to dedicated IPs later?

Maildoso does not offer a dedicated IP product. To move to dedicated IPs, you would need to switch to Infraforge or InboxKit. InboxKit offers Google Workspace mailboxes on US-based IPs through its three tiers (Professional $31, Agency $81, Enterprise $250 for the corresponding 10/30/100 mailbox slots), which is cheaper at every tier than the equivalent Infraforge configuration once the Infraforge IP fee and domain masking are factored in.

Do both work with SendKit?

Yes. Both Maildoso and Infraforge integrate with SendKit for AI warmup, sequences, and deliverability monitoring.

Maildoso vs Infraforge: Real Costs

We compared Maildoso and Infraforge on pricing, shared vs dedicated IPs, and features. See which email infrastructure provider fits your cold email setup.

By Akshay Prasath

3 min readUpdated Mar 2026

The Verdict

Maildoso offers the cheapest mailboxes from $1.90/mo on shared IPs. Infraforge offers dedicated IP SMTP from $3-$4/mo plus $99/mo for the IP. Choose Maildoso for budget efficiency.

Choose Infraforge for sender isolation. For a tiered alternative with Google Workspace and bundled deliverability tooling, consider InboxKit (Professional $31 for 10 slots, Agency $81 for 30 slots, Enterprise $250 for 100 slots).

Maildoso vs Infraforge

Feature	Maildoso	Infraforge
Pricing
Price per Mailbox	$1.90-$2.50/mo SMTP from $1.90, Combo from $2-$3	$3-$4/mo Dedicated IP SMTP mailboxes
Dedicated IP Cost	Not available No dedicated IP option	$99/mo Dedicated IP add-on at $99/mo
Cost for 100 Mailboxes	$190-$250/mo 100 x $1.90-$2.50, no additional fees	$350-$499/mo 100 x $3.50 avg + $99 dedicated IP
Infrastructure
IP Infrastructure	Shared IPs Shared IP pools	Dedicated IPs Dedicated IP ($99/mo extra)
Multi IP Provisioning	No Not available on shared IPs	Yes Provision multiple dedicated IPs
Deliverability
Pre-warmed Domains	No Warmup from sending tool needed	Yes Domains come pre-warmed
Scale
Scale Track Record	400K+ mailboxes 400K+ managed, 10M+ emails/day	Part of Salesforge Scale data from Salesforge ecosystem
Social Proof
G2 Rating	4.7 (159 reviews) Verified G2 reviews	Not listed No standalone G2 rating
Automation
API Access	API + MCP Full API and MCP protocol	Yes API access available

Shared vs Dedicated IPs

The fundamental choice here is shared versus dedicated IP infrastructure. Maildoso runs on shared IPs, meaning your mailboxes send from IP addresses used by other Maildoso customers. Infraforge provides dedicated IPs that are exclusively yours.

Shared IPs are fine for many cold email teams, especially when paired with good warmup and sending practices through SendKit. The risk is that another sender on your IP pool can damage the shared reputation. Dedicated IPs eliminate that risk entirely but cost significantly more.

For teams sending under 50,000 emails per month, shared IPs with proper warmup are usually sufficient. Above that volume, dedicated IPs become more important for protecting deliverability.

Key takeaways

Maildoso: shared IPs, fine for most teams under 50K emails/mo
Infraforge: dedicated IPs, important for high-volume senders
Dedicated IPs eliminate risk from other senders on your IP pool
Both benefit from SendKit AI warmup and monitoring

Cost Comparison

The cost gap is substantial. At 100 mailboxes: Maildoso costs $190 to $250/mo. Infraforge costs approximately $350 to $400 for mailboxes plus $99 for the dedicated IP, totaling $449 to $499/mo.

That is roughly double. For teams that need Google Workspace or Microsoft 365 mailboxes with bundled deliverability tooling, InboxKit Enterprise offers 100 mailbox slots at $250/mo (effective $2.50 per mailbox) with US-based IPs and the verifier, placement testing, and blacklist checker included in the tier. Email Warmup is a separate $3/mailbox add-on if needed.

Key takeaways

100 mailboxes: Maildoso ~$220/mo vs Infraforge ~$450/mo
Infraforge costs roughly double due to dedicated IP add-on
InboxKit offers a middle ground: $250/mo with dedicated IPs and GWS

Maildoso vs Infraforge: Which One Fits Your Use Case

Choose Maildoso if you want the cheapest infrastructure and are comfortable with shared IPs. Pair with SendKit for warmup and monitoring to mitigate shared IP risk. Choose Infraforge if you need dedicated IP isolation for high-volume campaigns or sensitive domains.

The extra cost buys real sender reputation protection. Consider InboxKit as a third option: tiered pricing (Professional $31 for 10 mailboxes, Agency $81 for 30, Enterprise $250 for 100) with US-based IPs and Google Workspace or Microsoft 365 mailboxes. Cheaper than Infraforge at every comparable tier and more feature-bundled than Maildoso (verifier, placement testing, blacklist checker included; warmup +$3/mailbox).

Key takeaways

Maildoso: cheapest option, shared IPs, pair with SendKit for warmup
Infraforge: dedicated IPs for high-volume sender isolation
InboxKit: best value for dedicated IPs with deliverability tools

Pros & Cons

Maildoso

Strengths

Cheapest per-mailbox pricing from $1.90/mo
400K+ mailboxes managed, proven at scale
4.7 G2 rating from 159 verified reviews
API + MCP support for automation
Google Workspace Combo tier available

Limitations

Shared IP infrastructure only
No dedicated IP option available
No pre-warmed domains
No built-in deliverability tools

Infraforge

Strengths

Dedicated IP infrastructure for sender isolation
Pre-warmed domains for faster ramp-up
Multi IP provisioning
API access and masterbox
Upgrade path from Mailforge

Limitations

Significantly more expensive at scale
Dedicated IP costs $99/mo extra
SSL and domain masking adds $2/domain/mo
SMTP only, no Google Workspace
No built-in deliverability tools

Keep reading

frequently asked questions

Got questions? We've got answers.

Yes, significantly. Maildoso starts at $1.90/mailbox with no extra fees. Infraforge starts at $3/mailbox plus $99/mo for dedicated IP. At 100 mailboxes, Maildoso costs roughly $220/mo versus $450/mo for Infraforge.

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