Inframail's pitch is simple and, at huge scale, compelling: a flat monthly fee — $129/month for the Unlimited plan — for unlimited inboxes on dedicated IPs. But two catches matter. First, Inframail is Microsoft/Outlook only — no Google Workspace. Second, the flat fee comes with email volume caps (80,000/month on Unlimited, 300,000 on the Agency Pack). And the flat-rate math only beats per-mailbox pricing once you're running a lot of inboxes. Icemail gives you Google and Microsoft, no send caps, at $2.50 per mailbox.
If you need only Outlook and you're running well over ~50 inboxes, Inframail's flat fee can be cheap per inbox. If you want Google Workspace, no volume caps, and pay-as-you-go flexibility, Icemail is the better fit.
| Feature | Icemail | Inframail |
|---|---|---|
| Price | $2.50 per active mailbox | $129/mo (Unlimited) / $327/mo (Agency Pack) |
| Model | Pay-as-you-go per mailbox | Flat fee, unlimited inboxes |
| Google Workspace | Yes | No |
| Microsoft 365 (US-IP) | Yes | Dedicated IP |
| Email volume caps | None (sender-limited) | 80K–300K emails/month |
| IP warmup | Provider trust built in | Dedicated IPs start cold (4–8 wks) |
| Free replacements | Unlimited | Not stated |
| Best at | Any scale, flexible | 100+ Outlook inboxes |
| Sequencer export | One-click, many tools | Instantly, Smartlead, Reachinbox |
Inframail's flat-rate model genuinely shines at high inbox counts — at 100+ Outlook inboxes, the per-inbox cost approaches zero, with dedicated US IPs and free domains included. If your operation is Outlook-only and very large, it's a cost-effective, predictable option.
Google AND Microsoft. Inframail provisions Outlook/Microsoft 365 exclusively. Many cold email programs need Google Workspace for deliverability diversity and certain audiences. Icemail offers both on US IPs.
No send caps. Inframail caps email volume at 80,000–300,000/month depending on plan. Icemail places no volume cap on the infrastructure — your sending tool sets the pace.
Warmth from day one. Inframail's dedicated IPs start cold and need 4–8 weeks of careful warmup, with external warmup tools required. Icemail's Google/Microsoft accounts ride existing provider reputation.
Flexibility below scale. Flat-rate pricing only becomes cost-effective above roughly 43–50 mailboxes; below that, per-mailbox pricing is cheaper. Icemail is the better economic call until you're running large fleets — and stays flexible if your count goes up and down.
Inframail Unlimited: $129/mo flat, Outlook only, capped at 80K emails/mo — efficient only once you're well past ~50 inboxes.
Icemail (30 mailboxes): 30 × $2.50 = $75/mo, Google or Microsoft, no send cap, scale up or down anytime.
Pay-as-you-go. No tier minimums. Google + Microsoft on US IPs.
Start at $2.50/mailboxBook a 30-minute call with our team — we'll map your setup.