InfraBoxes review: private mailboxes from $4.50 to $2.30, sold on a call, sending on top
InfraBoxes sells private SMTP mailboxes on its own servers with warmup included, plus Google mailboxes, and exports them to Instantly, Smartlead or Apollo. Its pricing page runs from $4.50 an inbox down to $2.30 at 1,000+, every tier behind a call, and its home page quotes a flat $3. It publishes no daily sending limit, no domain price and no refund terms. 2,500 cold emails a day on its 100-inbox tier come to at least $397 a month with Instantly; 100 Outreach2day mailboxes send the same for $171.67 with warmup and our sequencer.
- Warmup and sending included
- $2.50 a mailbox, 12 minimum
- Month-to-month billing
Monthly cost · 25,000 cold emails a day, sending included
- InfraBoxes + InstantlyInfraBoxes + Instantly: from $3,006
- Outreach2day mailboxes + InstantlyOutreach2day mailboxes + Instantly: $1,422.67
- Outreach2day all-inOutreach2day all-in: $716.67
- Price per mailbox
- from $2.30 a month (1,000+ inboxes)
- Outreach2day per mailbox
- $2.50 month to month, $1.50 from 100, $0.50 from 1,000
- Smallest order
- Not stated; the lowest tier starts at 9 inboxes
- Mailbox types
- Google, SMTP
- Warmup
- Included: "Every mailbox comes with warmup, monitoring, and burn protection built in"; the warmup tool is not named
- MCP server
- Not published
Fit
Who InfraBoxes fits
Pick InfraBoxes if
- You run an agency and want private SMTP stacks per 10 domains
- You buy 1,000+ inboxes and can negotiate on a call
- You want warmup inside the mailbox price
Look elsewhere if
- You want to read the sending limit and refund terms before paying
- You want a self-serve checkout
- You want to know the company you contract with
- You want a sequencer in the same bill
Overview
What InfraBoxes is
InfraBoxes describes itself as cold email infrastructure for agencies sending 50,000 to 1,000,000+ emails a month: private servers, aged IPs and warmup, with every 10 domains on their own stack of IPs and servers. You bring the domains, it sets SPF, DKIM and DMARC in 10 to 12 minutes, and you export the mailboxes to your sequencer.
The site names no company, country or address: the terms and privacy pages are two sentences each, with hello@infraboxes.com as the contact. Its web app's sign-up page reads "Join Aerosend today" and its affiliate menu opens Aerosend's affiliate site, so the app looks like a rebranded copy of Aerosend's platform; InfraBoxes does not say so itself.
It sends nothing on its own. The home page lists Smartlead, Instantly, Apollo and in-house tools as the places the mailboxes go, without saying whether the export is a CSV or a direct connection.
Private SMTP mailboxes on dedicated servers with aged IPs and warmup, plus Google mailboxes, on your own domains, exported to your sequencer source (opens the vendor's page in a new tab)
No legal entity or country published; its terms and privacy pages are two sentences each; the app's sign-up page reads "Join Aerosend today" source (opens the vendor's page in a new tab)
Pricing
InfraBoxes pricing
What InfraBoxes charges and what the price includes, next to Outreach2day. Each cell links the page it comes from.
| Feature | InfraBoxes | Outreach2day |
|---|---|---|
| Price per mailbox | Private mailboxes $4.50 to $2.30 by volume on the pricing page ($3 flat on the home page); Google from $2.50 source (opens the vendor's page in a new tab) | $2.50 a month up to 99 mailboxes, $1.50 from 100, $0.50 from 1,000; warmup, sequencer and analytics included at every tier details |
| Smallest order | Not stated; the lowest tier starts at 9 inboxes source (opens the vendor's page in a new tab) | 12 mailboxes, $30 a month details |
| Domain cost | Bring your own; no domain price published source (opens the vendor's page in a new tab) | $13 a year for a .com, $5 for a .info, registered to you; or connect your own for free details |
| Setup fees | Not published source (opens the vendor's page in a new tab) | No setup or platform fee; a card fee of 2.9% + $0.30 at checkout on new domains and the first month details |
| Warmup | IncludedIncluded: "Every mailbox comes with warmup, monitoring, and burn protection built in"; the warmup tool is not named source (opens the vendor's page in a new tab) | IncludedIncluded for the life of the mailbox, 75+ warmup emails a day details |
| Sequencer | Export to Smartlead, Instantly, Apollo or in-house tools; the export method is not described source (opens the vendor's page in a new tab) | IncludedIts own sequencer; syncs to Instantly and Smartlead, CSV export for 14 tools details |
| Export to other tools | IncludedExport to Smartlead, Instantly, Apollo or in-house tools; method not described source (opens the vendor's page in a new tab) | IncludedSyncs to Instantly and Smartlead by API key; CSV export in the import format of 14 tools, EmailBison among them; SMTP/IMAP logins for any other tool details |
| API and MCP | Partly, or at extra cost"Webhook + API access" on every plan; no public API docs (/docs returns 404). MCP: Not published source (opens the vendor's page in a new tab) | IncludedREST API on every account. MCP: Hosted MCP server: domains, mailboxes, warmup, campaigns, replies details |
Price per mailbox
- InfraBoxes
- Private mailboxes $4.50 to $2.30 by volume on the pricing page ($3 flat on the home page); Google from $2.50 source (opens the vendor's page in a new tab)
- Outreach2day
- $2.50 a month up to 99 mailboxes, $1.50 from 100, $0.50 from 1,000; warmup, sequencer and analytics included at every tier details
Smallest order
- InfraBoxes
- Not stated; the lowest tier starts at 9 inboxes source (opens the vendor's page in a new tab)
- Outreach2day
- 12 mailboxes, $30 a month details
Domain cost
- InfraBoxes
- Bring your own; no domain price published source (opens the vendor's page in a new tab)
- Outreach2day
- $13 a year for a .com, $5 for a .info, registered to you; or connect your own for free details
Setup fees
- InfraBoxes
- Not published source (opens the vendor's page in a new tab)
- Outreach2day
- No setup or platform fee; a card fee of 2.9% + $0.30 at checkout on new domains and the first month details
Warmup
- InfraBoxes
- IncludedIncluded: "Every mailbox comes with warmup, monitoring, and burn protection built in"; the warmup tool is not named source (opens the vendor's page in a new tab)
- Outreach2day
- IncludedIncluded for the life of the mailbox, 75+ warmup emails a day details
Sequencer
- InfraBoxes
- Export to Smartlead, Instantly, Apollo or in-house tools; the export method is not described source (opens the vendor's page in a new tab)
- Outreach2day
- IncludedIts own sequencer; syncs to Instantly and Smartlead, CSV export for 14 tools details
Export to other tools
- InfraBoxes
- IncludedExport to Smartlead, Instantly, Apollo or in-house tools; method not described source (opens the vendor's page in a new tab)
- Outreach2day
- IncludedSyncs to Instantly and Smartlead by API key; CSV export in the import format of 14 tools, EmailBison among them; SMTP/IMAP logins for any other tool details
API and MCP
- InfraBoxes
- Partly, or at extra cost"Webhook + API access" on every plan; no public API docs (/docs returns 404). MCP: Not published source (opens the vendor's page in a new tab)
- Outreach2day
- IncludedREST API on every account. MCP: Hosted MCP server: domains, mailboxes, warmup, campaigns, replies details
| Plan | Price | Mailboxes | Per mailbox | Billing | Includes |
|---|---|---|---|---|---|
| 9–15 inboxes | $4.50 an inbox a month | 9 to 15 | $4.50 | monthly | Private, isolated infrastructure; sold on a call source (opens the vendor's page in a new tab) |
| 30–100 inboxes | $3.50 an inbox a month | 30 to 100 | $3.50 | monthly | "Most popular"; warmup, burn alerts, API source (opens the vendor's page in a new tab) |
| 100–300 inboxes | $3 an inbox a month | 100 to 300 | $3.00 | monthly | Free data and GTM consultation from 100 mailboxes source (opens the vendor's page in a new tab) |
| 300–500 inboxes | $2.80 an inbox a month | 300 to 500 | $2.80 | monthly | Private dedicated stacks per about 10 domains source (opens the vendor's page in a new tab) |
| 500–1,000 inboxes | $2.50 an inbox a month | 500 to 1,000 | $2.50 | monthly | Sold on a call source (opens the vendor's page in a new tab) |
| 1,000+ inboxes | $2.30 an inbox a month | 1,000 and more | $2.30 | monthly | "Custom rollout support" source (opens the vendor's page in a new tab) |
| Google mailbox | From $2.50 a month | per mailbox | $2.50 | monthly | "Google Workspace mailboxes connected through InfraBoxes" (home page only) source (opens the vendor's page in a new tab) |
9–15 inboxes$4.50 an inbox a month
9 to 15 · $4.50 · monthly
Private, isolated infrastructure; sold on a call source (opens the vendor's page in a new tab)
30–100 inboxes$3.50 an inbox a month
30 to 100 · $3.50 · monthly
"Most popular"; warmup, burn alerts, API source (opens the vendor's page in a new tab)
100–300 inboxes$3 an inbox a month
100 to 300 · $3.00 · monthly
Free data and GTM consultation from 100 mailboxes source (opens the vendor's page in a new tab)
300–500 inboxes$2.80 an inbox a month
300 to 500 · $2.80 · monthly
Private dedicated stacks per about 10 domains source (opens the vendor's page in a new tab)
500–1,000 inboxes$2.50 an inbox a month
500 to 1,000 · $2.50 · monthly
Sold on a call source (opens the vendor's page in a new tab)
1,000+ inboxes$2.30 an inbox a month
1,000 and more · $2.30 · monthly
"Custom rollout support" source (opens the vendor's page in a new tab)
Google mailboxFrom $2.50 a month
per mailbox · $2.50 · monthly
"Google Workspace mailboxes connected through InfraBoxes" (home page only) source (opens the vendor's page in a new tab)
List prices from InfraBoxes's pricing page and Outreach2day's pricing page, checked . Taxes and card fees excluded.
Add-ons and extra costs
- The home page prices a private mailbox at a flat $3 (30 for $90, 100 for $300); the pricing page lists $3.50 at 30 to 100 (30 for $105, 100 for $350) source (opens the vendor's page in a new tab)
- Every pricing tier has a "Schedule a call" button; no self-serve checkout is published source (opens the vendor's page in a new tab)
- No price is published for 1 to 8 or 16 to 29 inboxes; no yearly prices source (opens the vendor's page in a new tab)
- Domains: bring your own; buying domains through InfraBoxes and a domain price are not published; the app bills "Domain Slots" at a price shown only after login source (opens the vendor's page in a new tab)
Two price lists. The home page says $3 per private mailbox and $2.50 per Google mailbox, 100 for $300 or $250. The pricing page lists one per-inbox price by volume: $4.50 for 9 to 15, $3.50 for 30 to 100, $3 for 100 to 300, $2.80 for 300 to 500, $2.50 for 500 to 1,000 and $2.30 above 1,000, and its own table prices 100 inboxes at $350. Every tier opens a sales call; no checkout is published.
What the price leaves out. Domains are yours to buy, and the app bills them as "Domain Slots" at a price shown only after login. No setup fee, yearly price, trial or refund policy is published. Nothing is priced for 1 to 8 or 16 to 29 inboxes.
Sending limits are not published either. Our cost table gives InfraBoxes 25 cold emails a mailbox a day and 5 mailboxes per domain, the same as ours, and leaves its domains out, so its totals are floors.
Full cost
What 2,500, 5,000 and 25,000 cold emails a day cost with InfraBoxes
The same emails a day on every row: InfraBoxes mailboxes at 25 a day (not published; 25, as ours) with the Instantly plan it needs to send and warm up, next to Outreach2day mailboxes (25 a day each) in Instantly and Outreach2day on its own.
- InfraBoxes + InstantlyInfraBoxes + Instantly: from $397
- Outreach2day mailboxes + InstantlyOutreach2day mailboxes + Instantly: $268.67
- Outreach2day all-inOutreach2day all-in: $171.67
- InfraBoxes + InstantlyInfraBoxes + Instantly: from $784
- Outreach2day mailboxes + InstantlyOutreach2day mailboxes + Instantly: $527.33
- Outreach2day all-inOutreach2day all-in: $343.33
- InfraBoxes + InstantlyInfraBoxes + Instantly: from $3,006
- Outreach2day mailboxes + InstantlyOutreach2day mailboxes + Instantly: $1,422.67
- Outreach2day all-inOutreach2day all-in: $716.67
| Setup | 2,500 a day · 55,000 a month100 InfraBoxes mailboxes at 25 a day, 100 of ours at 25 | 5,000 a day · 110,000 a month200 InfraBoxes mailboxes at 25 a day, 200 of ours at 25 | 25,000 a day · 550,000 a month1,000 InfraBoxes mailboxes at 25 a day, 1,000 of ours at 25 |
|---|---|---|---|
| InfraBoxes + Instantly Private SMTP mailboxes from $2.30 a month (1,000+ inboxes) · 25 cold emails a day each; Instantly for sending and warmup | from $397a month at least $225.33 more than Outreach2day all-infrom $7.22 per 1,000 emails · 100 mailboxesMailboxes alone: $300 a month
| from $784a month at least $440.67 more than Outreach2day all-infrom $7.13 per 1,000 emails · 200 mailboxesMailboxes alone: $600 a month
| from $3,006a month at least $2,289.33 more than Outreach2day all-infrom $5.47 per 1,000 emails · 1,000 mailboxesMailboxes alone: $2,300 a month
|
| Outreach2day mailboxes + Instantly Keep Instantly, buy the mailboxes from us; 25 a day each | $268.67a month $97 more than Outreach2day all-in$4.88 per 1,000 emails · 100 mailboxesMailboxes alone: $150 a month
| $527.33a month $184 more than Outreach2day all-in$4.79 per 1,000 emails · 200 mailboxesMailboxes alone: $300 a month
| $1,422.67a month $706 more than Outreach2day all-in$2.59 per 1,000 emails · 1,000 mailboxesMailboxes alone: $500 a month
|
| Outreach2day all-in Mailboxes, warmup and our sequencer in one bill; 25 a day each | $171.67a month $3.12 per 1,000 emails · 100 mailboxesMailboxes alone: $150 a month
| $343.33a month $3.12 per 1,000 emails · 200 mailboxesMailboxes alone: $300 a month
| $716.67a month $1.30 per 1,000 emails · 1,000 mailboxesMailboxes alone: $500 a month
|
- InfraBoxes + Instantly
Private SMTP mailboxes from $2.30 a month (1,000+ inboxes) · 25 cold emails a day each; Instantly for sending and warmup
- 2,500 a day · 55,000 a month
from $397a month
at least $225.33 more than Outreach2day all-infrom $7.22 per 1,000 emails · 100 mailboxesMailboxes alone: $300 a month
- 100 private mailboxes at $3.00 (pricing-page tier): $300 source (opens the vendor's page in a new tab)
- 20 domains, price not published: Not published source (opens the vendor's page in a new tab)
- Instantly Hypergrowth (sequencer, warmup): $97 source (opens the vendor's page in a new tab)
- 5,000 a day · 110,000 a month
from $784a month
at least $440.67 more than Outreach2day all-infrom $7.13 per 1,000 emails · 200 mailboxesMailboxes alone: $600 a month
- 200 private mailboxes at $3.00 (pricing-page tier): $600 source (opens the vendor's page in a new tab)
- 40 domains, price not published: Not published source (opens the vendor's page in a new tab)
- Instantly Hypergrowth + 1 Outbound add-on (sequencer, warmup): $184 source (opens the vendor's page in a new tab)
- 25,000 a day · 550,000 a month
from $3,006a month
at least $2,289.33 more than Outreach2day all-infrom $5.47 per 1,000 emails · 1,000 mailboxesMailboxes alone: $2,300 a month
- 1,000 private mailboxes at $2.30 (pricing-page tier): $2,300 source (opens the vendor's page in a new tab)
- 200 domains, price not published: Not published source (opens the vendor's page in a new tab)
- Instantly Hypergrowth + 7 Outbound add-ons (sequencer, warmup): $706 source (opens the vendor's page in a new tab)
- Outreach2day mailboxes + Instantly
Keep Instantly, buy the mailboxes from us; 25 a day each
- 2,500 a day · 55,000 a month
$268.67a month
$97 more than Outreach2day all-in$4.88 per 1,000 emails · 100 mailboxesMailboxes alone: $150 a month
- 100 Outreach2day mailboxes at $1.50 (volume price from 100): $150
- 20 domains at $13 a year: $21.67
- Instantly Hypergrowth (sequencer, warmup): $97 source (opens the vendor's page in a new tab)
- 5,000 a day · 110,000 a month
$527.33a month
$184 more than Outreach2day all-in$4.79 per 1,000 emails · 200 mailboxesMailboxes alone: $300 a month
- 200 Outreach2day mailboxes at $1.50 (volume price from 100): $300
- 40 domains at $13 a year: $43.33
- Instantly Hypergrowth + 1 Outbound add-on (sequencer, warmup): $184 source (opens the vendor's page in a new tab)
- 25,000 a day · 550,000 a month
$1,422.67a month
$706 more than Outreach2day all-in$2.59 per 1,000 emails · 1,000 mailboxesMailboxes alone: $500 a month
- 1,000 Outreach2day mailboxes at $0.50 (volume price from 1,000): $500
- 200 domains at $13 a year: $216.67
- Instantly Hypergrowth + 7 Outbound add-ons (sequencer, warmup): $706 source (opens the vendor's page in a new tab)
- Outreach2day all-in
Mailboxes, warmup and our sequencer in one bill; 25 a day each
- 2,500 a day · 55,000 a month
$171.67a month
$3.12 per 1,000 emails · 100 mailboxesMailboxes alone: $150 a month
- 100 mailboxes at $1.50 (volume price from 100), warmup and sequencer included: $150
- 20 domains at $13 a year: $21.67
- 5,000 a day · 110,000 a month
$343.33a month
$3.12 per 1,000 emails · 200 mailboxesMailboxes alone: $300 a month
- 200 mailboxes at $1.50 (volume price from 100), warmup and sequencer included: $300
- 40 domains at $13 a year: $43.33
- 25,000 a day · 550,000 a month
$716.67a month
$1.30 per 1,000 emails · 1,000 mailboxesMailboxes alone: $500 a month
- 1,000 mailboxes at $0.50 (volume price from 1,000), warmup and sequencer included: $500
- 200 domains at $13 a year: $216.67
Compared at the same emails a day, each vendor at its own published emails per mailbox a day: a cheap mailbox that sends 5 a day costs more per email than one that sends 25. Mailboxes = emails a day ÷ emails per mailbox a day (InfraBoxes: 25, not published; 25, as ours; Outreach2day: 25). A month is 22 sending days, so emails a month = emails a day × 22. Monthly list prices on monthly billing; the Instantly plan is the cheapest one that covers the volume. InfraBoxes does not publish a domain price, so its domains (5 mailboxes each) are left out of the total, marked "from"; Outreach2day .com domains at $13 a year, 5 mailboxes per domain. Domains spread over 12 months. Outreach2day mailboxes on comparison pages: $2.50 a mailbox up to 99, $1.50 from 100, $0.50 from 1,000; larger volumes on the Enterprise plan. A mailbox-only vendor cannot send campaigns on its own, so its total is the full sending setup: its mailboxes, domains and the sequencer plan that covers the volume. Instantly is the reference sequencer, on its published plans for the emails and new contacts a month (emails ÷ 3); Smartlead where Instantly publishes no plan; Mailforge with Salesforge, because its mailboxes cannot be warmed in Instantly. The mailbox line is listed on its own in every cell.
Your saving · 25,000 a day
You save $2,289.33 a month ($27,472 a year)with Outreach2day at 25,000 cold emails a day, against InfraBoxes + Instantly at list prices
We move your mailboxes and campaigns for you, free
New · Outreach2day volume pricing
The mailbox price falls from 100 and again from 1,000 mailboxes
Warmup, the sequencer and the replies inbox included at every tier
- Up to 99 mailboxes$2.50a mailbox a month
- From 100 mailboxes$1.50a mailbox a month
- From 1,000 mailboxes$0.50a mailbox a month
Enterprise plan. Better prices for larger volumes.
Book a callAt 2,500 cold emails a day InfraBoxes needs 100 inboxes at its $3 tier ($300) and Instantly Hypergrowth for sending ($97): $397 a month before domains, or $7.22 per 1,000 emails. 100 Outreach2day mailboxes cost $171.67 all in, domains included, or $268.67 in the same Instantly plan.
At 25,000 a day: 1,000 InfraBoxes inboxes at $2.30 and Instantly with add-ons come to $3,006 a month before domains. 1,000 Outreach2day mailboxes at $0.50 from 1,000 are $716.67 with domains, warmup and our sequencer.
What InfraBoxes does well
- Warmup included in the mailbox price
- Private servers, with every 10 domains on their own stack
- API and webhooks on every plan
- Volume price down to $2.30 an inbox from 1,000
- Free data and GTM consultation from 100 mailboxes
Verdict
InfraBoxes offers private SMTP infrastructure with warmup and a volume price that falls to $2.30, sold on a call to agencies. The site leaves out the company behind it, the sending limit, the domain price and the refund terms, and at equal volume the setup costs more than twice ours before domains.
Outreach2day is $2.50 a mailbox month to month, $1.50 from 100 and $0.50 from 1,000, with warmup for the life of the mailbox, 25 cold emails a day from day 14 and our own sequencer. Keep Instantly or Smartlead if you like: our mailboxes sync in by API key. Our mailboxes run on our own infrastructure and land in the inbox.
At scale
From 25,000 to 1,000,000 cold emails a day
The same setups at larger daily volumes. A vendor without a published price at a size reads “Custom pricing (not published)” and has no bar.
Running 25,000+ a day? Enterprise plan: better prices for larger volumes.Book a call
- InfraBoxes + InstantlyInfraBoxes + Instantly: from $3,006
- Outreach2day mailboxes + InstantlyOutreach2day mailboxes + Instantly: $1,422.67
- Outreach2day all-inOutreach2day all-in: $716.67
- InfraBoxes + InstantlyInfraBoxes + Instantly: from $5,915
- Outreach2day mailboxes + InstantlyOutreach2day mailboxes + Instantly: $2,748.33
- Outreach2day all-inOutreach2day all-in: $1,433.33
- InfraBoxes + InstantlyInfraBoxes + Instantly: from $11,820
- Outreach2day mailboxes + InstantlyOutreach2day mailboxes + Instantly: $5,486.67
- Outreach2day all-inOutreach2day all-in: $2,866.67
- Outreach2day all-inOutreach2day all-in: $7,166.67
- Outreach2day all-inOutreach2day all-in: $14,333.33
- Outreach2day all-inOutreach2day all-in: $28,666.67
| Setup | 25,000 a day550,000 a month1,000 mailboxes | 50,000 a day1,100,000 a month2,000 mailboxes | 100,000 a day2,200,000 a month4,000 mailboxes | 250,000 a day5,500,000 a month10,000 mailboxes | 500,000 a day11,000,000 a month20,000 mailboxes | 1,000,000 a day22,000,000 a month40,000 mailboxes |
|---|---|---|---|---|---|---|
| InfraBoxes + Instantly | from $3,006$2,289.33 more | from $5,915$4,481.67 more | from $11,820$8,953.33 more | Custom pricing (not published) | Custom pricing (not published) | Custom pricing (not published) |
| Outreach2day mailboxes + Instantly | $1,422.67$706 more | $2,748.33$1,315 more | $5,486.67$2,620 more | Custom pricing (not published) | Custom pricing (not published) | Custom pricing (not published) |
| Outreach2day all-in | $716.67 | $1,433.33 | $2,866.67 | $7,166.67 | $14,333.33 | $28,666.67 |
Mailboxes = emails a day ÷ emails per mailbox a day (InfraBoxes: 25; Outreach2day: 25). A month is 22 sending days, so emails a month = emails a day × 22. The Instantly plan is the published plan that covers the volume (its contacts and emails); where a vendor publishes no price at that size, the cell says so and the chart leaves it out. Domains at each vendor's published price spread over 12 months; Outreach2day .com domains at $13 a year, 5 mailboxes per domain, are in every total.
Every line at scale
- InfraBoxes + Instantly, 25,000 a day: 1,000 private mailboxes at $2.30 (pricing-page tier) ($2,300) source (opens the vendor's page in a new tab) + 200 domains, price not published (not published) + Instantly Hypergrowth + 7 Outbound add-ons (sequencer, warmup) ($706) = from $3,006
- InfraBoxes + Instantly, 50,000 a day: 2,000 private mailboxes at $2.30 (pricing-page tier) ($4,600) source (opens the vendor's page in a new tab) + 400 domains, price not published (not published) + Instantly Hypergrowth + 14 Outbound add-ons (sequencer, warmup) ($1,315) = from $5,915
- InfraBoxes + Instantly, 100,000 a day: 4,000 private mailboxes at $2.30 (pricing-page tier) ($9,200) source (opens the vendor's page in a new tab) + 800 domains, price not published (not published) + Instantly Hypergrowth + 29 Outbound add-ons (sequencer, warmup) ($2,620) = from $11,820
- Outreach2day mailboxes + Instantly, 25,000 a day: 1,000 Outreach2day mailboxes at $0.50 (volume price from 1,000) ($500) + 200 domains at $13 a year ($216.67) + Instantly Hypergrowth + 7 Outbound add-ons (sequencer, warmup) ($706) = $1,422.67
- Outreach2day mailboxes + Instantly, 50,000 a day: 2,000 Outreach2day mailboxes at $0.50 (volume price from 1,000) ($1,000) + 400 domains at $13 a year ($433.33) + Instantly Hypergrowth + 14 Outbound add-ons (sequencer, warmup) ($1,315) = $2,748.33
- Outreach2day mailboxes + Instantly, 100,000 a day: 4,000 Outreach2day mailboxes at $0.50 (volume price from 1,000) ($2,000) + 800 domains at $13 a year ($866.67) + Instantly Hypergrowth + 29 Outbound add-ons (sequencer, warmup) ($2,620) = $5,486.67
- Outreach2day all-in, 25,000 a day: 1,000 mailboxes at $0.50 (volume price from 1,000), warmup and sequencer included ($500) + 200 domains at $13 a year ($216.67) = $716.67
- Outreach2day all-in, 50,000 a day: 2,000 mailboxes at $0.50 (volume price from 1,000), warmup and sequencer included ($1,000) + 400 domains at $13 a year ($433.33) = $1,433.33
- Outreach2day all-in, 100,000 a day: 4,000 mailboxes at $0.50 (volume price from 1,000), warmup and sequencer included ($2,000) + 800 domains at $13 a year ($866.67) = $2,866.67
- Outreach2day all-in, 250,000 a day: 10,000 mailboxes at $0.50 (volume price from 1,000), warmup and sequencer included ($5,000) + 2,000 domains at $13 a year ($2,166.67) = $7,166.67
- Outreach2day all-in, 500,000 a day: 20,000 mailboxes at $0.50 (volume price from 1,000), warmup and sequencer included ($10,000) + 4,000 domains at $13 a year ($4,333.33) = $14,333.33
- Outreach2day all-in, 1,000,000 a day: 40,000 mailboxes at $0.50 (volume price from 1,000), warmup and sequencer included ($20,000) + 8,000 domains at $13 a year ($8,666.67) = $28,666.67
Why each plan at scale
- Instantly at 25,000 a day: Light Speed + 4 Outbound add-ons. 550,000 emails and about 183,300 contacts; four add-ons give 1,000,000 emails and 200,000 contacts (Hypergrowth + 7 add-ons is also $706) source (opens the vendor's page in a new tab)
- Instantly at 50,000 a day: Light Speed + 11 Outbound add-ons. About 366,700 contacts a month; 11 add-ons give 375,000 contacts and 1,875,000 emails source (opens the vendor's page in a new tab)
- Instantly at 100,000 a day: Light Speed + 26 Outbound add-ons. About 733,300 contacts a month; 26 add-ons give 750,000 contacts source (opens the vendor's page in a new tab)
- Instantly: Above 100,000 a day the price would only be a multiplication of Outbound add-ons ($87 each) with no published maximum; Instantly lists Enterprise as custom. source (opens the vendor's page in a new tab)
Your size
What 2,500 cold emails a day cost a month
InfraBoxes + Instantlyfrom $397100 mailboxes × 25 a day = 2,500 cold emails a day
Outreach2day mailboxes + Instantly$268.67100 mailboxes × 25 a day = 2,500 cold emails a day
- Outreach2day all-in$171.67
100 mailboxes × 25 a day = 2,500 cold emails a day
You save $225.33 a month ($2,704 a year)with Outreach2day at 2,500 cold emails a day, against InfraBoxes + Instantly at list prices
We move your mailboxes and campaigns for you, free
Switching
Moving from InfraBoxes to Outreach2day
Keep your sequencer
Connect Instantly or Smartlead in Outreach2day with an API key and the warm mailboxes are added to your account; other tools take a CSV in their import format, or SMTP/IMAP logins. How the export works
Or move the campaigns
Our sequencer runs campaigns with steps, a send schedule, stop on reply and one inbox for replies; import the contacts as a CSV and recreate the steps. The mailbox price stays $2.50.
Warmup and the overlap
New mailboxes warm for 14 days before cold email, and warmup keeps running after that. Keep the InfraBoxes mailboxes sending during those two weeks, then shift the volume and cancel InfraBoxes for the end of its billing period.
InfraBoxes publishes no cancellation or refund terms, so ask on its sales call how to stop the domain slots and what happens to the current month. The domains are yours, so you can point them at a new provider.
Terms
InfraBoxes limits, setup and terms
Each line links to the vendor's page it comes from.
Smallest order
source (opens the vendor's page in a new tab)- Not stated; the lowest tier starts at 9 inboxes
Setup time
source (opens the vendor's page in a new tab)- "10–12 minutes" with SPF, DKIM and DMARC set automatically, per its comparison table
Mailbox types
source (opens the vendor's page in a new tab)- Private SMTP mailboxes on its dedicated servers and Google Workspace mailboxes; no Microsoft product
Domains
source (opens the vendor's page in a new tab)- Your own domains, added one by one or as a list; no domain sales or price published
Sending limits
source (opens the vendor's page in a new tab)- Emails per mailbox a day and mailboxes per domain not published; "We cap new domains automatically"; every 10 domains on their own stack
Warmup
source (opens the vendor's page in a new tab)- Included Included: "Every mailbox comes with warmup, monitoring, and burn protection built in"; the warmup tool is not named
Sequencers
source (opens the vendor's page in a new tab)- Export to Smartlead, Instantly, Apollo or in-house tools; the export method is not described
API
source (opens the vendor's page in a new tab)- Included "Webhook + API access" on every plan; no public API docs (/docs returns 404)
MCP server
source (opens the vendor's page in a new tab)- Not published
Support
source (opens the vendor's page in a new tab)- Email and chat, up to 10 seats; free data and GTM consultation from 100 mailboxes
Refunds
source (opens the vendor's page in a new tab)- Not published: the terms page has no refund clause
Trial
source (opens the vendor's page in a new tab)- Not published
Features
Other InfraBoxes features
- Aerosend
- The app's sign-up page reads "Join Aerosend today" and its affiliate menu opens affiliates.aerosend.io source (opens the vendor's page in a new tab)
- Claims
- Aged IPs, IP rotation, burn alerts and "95%+" inbox placement on healthy domains, its own figure with no method source (opens the vendor's page in a new tab)
- Price conflict
- Home page $3 flat for private mailboxes; pricing page $3.50 to $2.30 by volume source (opens the vendor's page in a new tab)
- Workspaces
- Team workspaces with roles and audit logs, and client workspaces for agencies source (opens the vendor's page in a new tab)
In detail
Warmup and aged IPs
Warmup is in the InfraBoxes price: "Every mailbox comes with warmup, monitoring, and burn protection built in". It does not name the warmup tool or say how many warmup emails a mailbox gets. New domains are capped automatically, and burn alerts flag a domain that starts to fail.
Its claims of aged IPs and 95%+ placement on healthy domains come without a method. Most people think only Google gets to the inbox and overpay for it. Our mailboxes run on our own infrastructure and land in the inbox, and every Outreach2day mailbox comes with Google and Outlook placement tests, so you can check both on the same copy.
What is not published
Before an order you cannot read on the site who you contract with, how many emails a mailbox may send, how many mailboxes go on a domain, what a domain slot costs, or what happens to the money if you cancel. InfraBoxes answers these on its sales call.
Its pages also contradict each other in places: the home comparison table labels its own column "Infraforge (InfraBoxes)", and the /features page in its sitemap returns 404. Read the Infraforge review if that is the product you meant.
Ratings
InfraBoxes ratings
Trustpilot returned an access error (HTTP 403) when we looked up infraboxes.com on 2026-10-24, so no score is shown.
Or us
InfraBoxes or Outreach2day
We sell cold email mailboxes too. Where our product fits this buyer and where it does not.
InfraBoxes
Stay with InfraBoxes if
- You need fewer than 12 mailboxes: our minimum order is 12
- You want aged IPs sold per stack of 10 domains
Outreach2day
Outreach2day fits if
- You run 100+ mailboxes: $1.50 a mailbox from 100 and $0.50 from 1,000, warmup and the sequencer included; larger volumes on the Enterprise plan
- You want warmup and a sequencer in the mailbox price
- You want $2.50 month to month, $1.50 from 100 and $0.50 from 1,000 on a self-serve order
- You want a published limit: 25 cold emails a mailbox a day from day 14
- You want an MCP server that also runs campaigns
| Feature | InfraBoxes | Outreach2day |
|---|---|---|
| Smallest order | Not stated; the lowest tier starts at 9 inboxes source (opens the vendor's page in a new tab) | 12 mailboxes, $30 a month details |
| Mailbox types | Private SMTP mailboxes on its dedicated servers and Google Workspace mailboxes; no Microsoft product source (opens the vendor's page in a new tab) | SMTP/IMAP on your domains (no Google Workspace or Microsoft 365 seats) details |
| Warmup | IncludedIncluded: "Every mailbox comes with warmup, monitoring, and burn protection built in"; the warmup tool is not named source (opens the vendor's page in a new tab) | IncludedIncluded for the life of the mailbox, 75+ warmup emails a day details |
| Sequencers | Export to Smartlead, Instantly, Apollo or in-house tools; the export method is not described source (opens the vendor's page in a new tab) | Its own sequencer; syncs to Instantly and Smartlead, CSV export for 14 tools details |
| API | Included"Webhook + API access" on every plan; no public API docs (/docs returns 404) source (opens the vendor's page in a new tab) | IncludedREST API on every account details |
| MCP server | Not published source (opens the vendor's page in a new tab) | IncludedHosted MCP server: domains, mailboxes, warmup, campaigns, replies details |
| Trial | Not published source (opens the vendor's page in a new tab) | No free trial details |
Smallest order
- InfraBoxes
- Not stated; the lowest tier starts at 9 inboxes source (opens the vendor's page in a new tab)
- Outreach2day
- 12 mailboxes, $30 a month details
Mailbox types
- InfraBoxes
- Private SMTP mailboxes on its dedicated servers and Google Workspace mailboxes; no Microsoft product source (opens the vendor's page in a new tab)
- Outreach2day
- SMTP/IMAP on your domains (no Google Workspace or Microsoft 365 seats) details
Warmup
- InfraBoxes
- IncludedIncluded: "Every mailbox comes with warmup, monitoring, and burn protection built in"; the warmup tool is not named source (opens the vendor's page in a new tab)
- Outreach2day
- IncludedIncluded for the life of the mailbox, 75+ warmup emails a day details
Sequencers
- InfraBoxes
- Export to Smartlead, Instantly, Apollo or in-house tools; the export method is not described source (opens the vendor's page in a new tab)
- Outreach2day
- Its own sequencer; syncs to Instantly and Smartlead, CSV export for 14 tools details
API
- InfraBoxes
- Included"Webhook + API access" on every plan; no public API docs (/docs returns 404) source (opens the vendor's page in a new tab)
- Outreach2day
- IncludedREST API on every account details
MCP server
- InfraBoxes
- Not published source (opens the vendor's page in a new tab)
- Outreach2day
- IncludedHosted MCP server: domains, mailboxes, warmup, campaigns, replies details
Trial
- InfraBoxes
- Not published source (opens the vendor's page in a new tab)
- Outreach2day
- No free trial details
Outreach2day mailboxes send from its own campaigns or from your sequencer; the fields and settings per tool are in the integration docs.
FAQ
InfraBoxes review: questions
How much does InfraBoxes cost?
Its pricing page lists $4.50 an inbox a month for 9 to 15, $3.50 for 30 to 100, $3 for 100 to 300, $2.80 for 300 to 500, $2.50 for 500 to 1,000 and $2.30 above 1,000. The home page quotes $3 per private mailbox and $2.50 per Google mailbox. Domains are yours and not priced on the site.
What do 2,500 cold emails a day cost with InfraBoxes?
100 inboxes at $3 and Instantly Hypergrowth: $397 a month before domains, assuming 25 a day since InfraBoxes publishes no limit. 100 Outreach2day mailboxes send the same for $171.67 with domains, warmup and our sequencer.
Does InfraBoxes include warmup?
Yes. Its home page says every mailbox comes with warmup, monitoring and burn protection; the warmup tool is not named.
Who is behind InfraBoxes?
The site names no company or country. Its app's sign-up page reads "Join Aerosend today" and links to Aerosend's affiliate program, which suggests it runs on Aerosend's platform.
Does InfraBoxes give refunds?
No refund or cancellation terms are published: its terms page is two sentences with no refund clause.
Is InfraBoxes the same as Infraforge?
No. Infraforge is a Forge product with its own review; InfraBoxes is a separate vendor whose home page table labels its own column "Infraforge (InfraBoxes)".
Deliverability call
Talk to our deliverability team
Book a call with the people who run our mailbox infrastructure. We look at your current setup and tell you what to change. Mailboxes are $1.50 from 100 and $0.50 from 1,000; for larger volumes we size an Enterprise plan with you.
- Review your domains, DNS records and current inbox placement
- Size the setup: domains, mailboxes per domain and daily volume per mailbox
- Plan warmup and the move from your current provider or sequencer
- Larger volumes: the Enterprise plan and its price for your setup
Free call
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Each vendor's own pages. Vendors change prices and plans; if something here is out of date, write to support@outreach2day.com and we will fix it.
Full volume from day 14: 25 cold emails a mailbox a day
Add domains, create mailboxes and turn on warmup. You see every mailbox's warmup numbers from day one.