InboxKit Review (2026): Mailboxes, Pricing, Policy Fine Print and Who It Fits

InboxKit is a solid, low-cost way to buy Microsoft 365 and Azure mailboxes for outreach, with automated DNS, sequencer export and a documented API. It is a harder call for US teams that want Google Workspace mailboxes, because InboxKit's own acceptable use policy ties its Google mailboxes to regional distribution arrangements for India. As of November 2026, mailboxes cost $3 a month ($2.50 on annual billing), and warmup and domains are extra.

Some tool links here are affiliate links (disclosure). Nerdy Joe is an InboxKit affiliate and also an Icemail affiliate, so we earn from both of the closest competitors compared below. If you want to look around first, you can create a free InboxKit account without a card.

Nerdy Joe is a certified Apollo.io Managed Services Partner and a PlusVibe Certified Silver Partner. Our relationship with InboxKit is affiliate only. We did not test InboxKit hands-on for this review and have no placement data of our own; everything below comes from published sources listed at the end.

InboxKit review: the short verdict

InboxKit sells real Google Workspace and Microsoft 365 mailboxes plus Azure tenants for cold outreach, sets up the domain records for you, and pushes the finished mailboxes into your sequencer. The price is low and flat. The trade-offs are in the paperwork: a reseller model with undisclosed tenant details, an India clause for Google mailboxes, strict refund rules, and terms that require opted-in recipients.

All InboxKit prices here are as of November 2026. For every line item, cost table and refund rule, see our full InboxKit pricing breakdown.

What InboxKit is

InboxKit describes itself as email infrastructure for outreach: "Google, Microsoft 365 & Azure mailboxes" with built-in warmup, automated DNS, bulk mailbox setup, per-domain admin panels, domain health checks, a REST API with webhooks, and an MCP server. Two add-ons sit on top: Isolated Warmup and InfraGuard, a domain protection suite.

It is not a sequencer. InboxKit creates mailboxes and domains, configures DNS, then exports the mailboxes to the tool that actually sends your campaigns. It also runs warmup and inbox placement tests, and offers free lookup tools.

The company behind it

InboxKit's terms name Enrich Labs L.L.C-FZ, based in Dubai, UAE, as the company operating InboxKit. The terms are governed by UAE law with disputes in Dubai courts. The terms header says "last updated" September 22, 2026, while Section 20 gives an effective date of February 9, 2026, which is an internal inconsistency worth knowing about.

The about page says InboxKit was founded in 2023 and is "Led from Dubai, UAE." It lists Rahul Lakhaney as CEO (the page says he "built" InboxKit), Mohit Mimani as CTO and Saksham Jain as COO. Team size and funding are not stated.

InboxKit's scale claims differ from page to page: "10,000+ email accounts" in a bio on the about page, and "500+ agencies," "50K+ client mailboxes managed" and "10M+ emails delivered daily" on the agency page. We report them as InboxKit's claims and do not pick one.

What "reseller" means here

Section 2 of InboxKit's terms says plainly: "Inboxkit is a reseller of email accounts from various email service providers." Its acceptable use policy says the service is powered by "official Google Workspace and Microsoft 365 mailboxes." That is the core of the product: InboxKit buys and provisions accounts from Google and Microsoft and sells them to you as a managed bundle.

Who InboxKit is for, and who it is not for

InboxKit frames its buyers as outreach and sales teams, cold email operators and agencies, including high-volume users.

InboxKit is a good fit if:

• You want Microsoft 365 or Azure mailboxes at a low flat rate with no minimum order.
• You run many domains and want DNS records created and monitored for you, ideally on Cloudflare.
• You build workflows by API or MCP, or manage infrastructure for several clients.
• You already pay for a sequencer with warmup and only need the mailboxes.

InboxKit is probably not the right fit if:

• You are outside India and specifically want Google Workspace mailboxes, and you are not ready to confirm the India clause with InboxKit first.
• You need a refund path if deliverability disappoints. Domains are never refunded, and fees are generally non-refundable.
• You want a published domain price before you start.
• You plan to email purchased lists. InboxKit's acceptable use policy bans that outright.

The India clause US buyers should read first

This is the single most important finding of this review for US readers, and it sits in a document most buyers never open.

Section 5 of InboxKit's acceptable use policy (last updated August 10, 2026) says its Google Workspace mailboxes are made available "under regional distribution arrangements for India," and that "Customers located outside India are respectfully encouraged to consider" its Microsoft 365 or Azure mailboxes. No other InboxKit page we read repeats this. The pricing page, homepage and Google Workspace knowledge base page sell Google mailboxes without mentioning it.

We are not interpreting what the clause means for your account, and InboxKit does not explain it further on the pages we read. The practical step is simple: if you are in the US, Canada, the UK or anywhere outside India and you want Google mailboxes, email InboxKit support and get a written answer before you order. Otherwise, InboxKit's own policy points you to its Microsoft 365 or Azure mailboxes.

If you are still deciding between the two providers, our guide to Google Workspace vs Microsoft 365 for cold email compares official sending limits, policy positions and cost by mailbox type.

How InboxKit provisions mailboxes

Whose tenant are the mailboxes in?

InboxKit's terms do not say whose Google or Microsoft tenant your mailboxes live in, who holds the licenses, or who owns the mailboxes. The ownership clause (5.2) covers only InboxKit's platform. The license is for "internal business operations" and is "non-transferable" (5.1).

The clearest description comes from a reseller, not from InboxKit. Smartlead's help center, which sells InboxKit mailboxes inside Smartlead, says each Google domain is "hosted under an independent Google Workspace" and each Outlook domain gets its own Microsoft 365 tenant. InboxKit's homepage mentions "per-domain admin panels," which is consistent with that, but we could not confirm that direct InboxKit purchases work the same way.

The Google partner and US IP claims

InboxKit's Google Workspace knowledge base page calls InboxKit an "official Google Workspace partner" and says accounts are created "through our official Google Partner program." Its about page does not mention partner status, and we did not find InboxKit in any Google partner directory. Treat it as InboxKit's claim.

The same page says each Google account gets a "dedicated static US IP address" from "tier-1 US providers." It does not explain how a dedicated IP applies to mail that Google Workspace sends from Google's own servers, and we could not verify it, so we do not rely on it.

What you get per mailbox

InboxKit says its Google mailboxes are "genuine Google Workspace Business Starter" subscriptions with "Full admin access immediately." Admin features listed across the site include per-domain isolated panels, an admin panel with two-factor authentication, app passwords, unlimited team members, and white-label with multi-workspace. We found no page that describes how the white-label option works.

Azure mailboxes

InboxKit's Azure product is "Microsoft 365 mailboxes provisioned on a Microsoft Azure tenant," sold in tenants of 25, 50 or 100 mailboxes for $30 a tenant a month. You can bring your own domain or buy one. Setup takes 1 to 2 hours, with an instant "Platform Connect" option, and you choose Quick Setup (guided) or Mailbox Flow (manual).

InboxKit claims "better sender reputation from Azure IPs" but publishes no data for it. Whose tenant the Azure mailboxes sit in and who holds admin access are not stated.

Setup times and mixing rules

InboxKit says setup takes 10 to 20 minutes, orders complete in 30 to 120 minutes, and Quick Setup takes "under 1 minute." Azure takes 1 to 2 hours. Smartlead says InboxKit mailboxes bought through its SmartSenders marketplace take about 48 hours, so timing depends on where you buy.

One rule from the API docs matters for planning: "All mailboxes on one domain must share a platform." You cannot put Google and Microsoft mailboxes on the same domain, so plan separate domains if you want a mix.

For migrations, InboxKit says most complete in 24 to 48 hours and come with 30 days of post-migration support.

Domains and DNS automation

DNS is one of InboxKit's clearest strengths, and its knowledge base documents it in more detail than most competitors.

Cloudflare is the recommended path: connect your Cloudflare account by API and the setup is fully automated. Otherwise InboxKit asks you to point nameservers to Cloudflare, a one-time change. The FAQ also lists GoDaddy, Namecheap, AWS Route53 and Google Cloud DNS with generated copy-paste records, and the page does not reconcile the two descriptions.

Limits InboxKit states

• Full automation only for Cloudflare-hosted domains.
• Propagation can take 24 to 48 hours globally (1 to 4 hours for most regions with the TTLs used).
• Changes can take up to 6 hours to be detected.
• Conflicts raise alerts rather than automatic fixes, and the SPF 10-lookup limit is monitored with alerts.

"Under 60 seconds" and "zero errors" appear in InboxKit's marketing about active setup time; we treat them as claims.

Buying domains

You can buy domains in the app or by API, paying from your wallet or a payment link. InboxKit says it pre-screens domains for blacklists and past abuse and offers "100% fresh domains" plus "premium aged domains." Pre-warmed domains carry a one-time fee "from $12.50."

You can connect a Cloudflare domain to InboxKit to see the automated records before you buy any mailboxes. If you want a refresher on the records themselves, our guide to cold email infrastructure walks through domains, mailboxes and authentication.

Warmup: an add-on, not included

InboxKit's homepage talks about "built-in warmup," but its warmup page lists warmup as a paid add-on at $3 per mailbox a month. The accurate description is an optional built-in warmup add-on. InboxKit's own warmup page also says sequencer-based warmup "is included with your sequencer subscription," so you can skip the add-on and warm inside Instantly, Smartlead, PlusVibe or a similar tool.

How InboxKit's warmup ramps

• 14 days to full capacity.
• Defaults start at 2 emails a day, rising by 2 a day, toward a target of 40 a day.
• Reply rates set at 30 to 50% for inbox placement and 2 to 3% for promotions.
• New domains can start warming the day they are bought, per InboxKit.

InboxKit's Google Workspace page describes a ramp of "20 to 500+ emails/day" over a 14-day protocol, which conflicts with the 40-a-day target on the warmup page. We report both.

The homepage says each mailbox warms on an "isolated" network. Its size and composition are not published.

The warmup health score

InboxKit publishes how its 0 to 100 health score is weighted, which is more than many vendors share.

If inbox placement drops below 50%, InboxKit says warmup adjusts automatically. Like any warmup score, it measures where warmup emails land, not how real prospects treat your campaigns.

Google and warmup tools

Google's email sender guidelines recommend increasing volume slowly to engaged recipients and do not mention warmup tools. Gmail's program policies prohibit automating Gmail in ways that mislead or deceive users. In 2023, GMass said Google required it to shut down its API-based warmup.

Google has not published a position on warmup networks specifically, so treat automated warmup as a practice Google neither endorses nor explicitly names. Warmup engagement comes from network inboxes, not real prospects, and Google's spam-rate thresholds apply to complaints from real recipients, which warmup does not change. Our email warmup guide covers what warmup can and cannot do.

Sending limits and per-domain guidance

InboxKit does not set a hard per-mailbox sending cap, and its acceptable use policy has no numeric limits. Its warmup page gives guidance instead:

• 10 to 15 cold emails per mailbox per day after warmup.
• A maximum of 3 mailboxes per domain.
• Sequencer presets of 15 sends and 25 warmup emails a day for Google and Microsoft mailboxes.
• Azure presets that lower per-mailbox volume as the tenant fills: 20 a day at 10 mailboxes, down to 2 a day at 100.

That last point matters for budgeting. A full 100-mailbox Azure tenant is cheap per mailbox, but by InboxKit's own presets it does not send more than a smaller tenant.

Smartlead's article on InboxKit mailboxes gives slightly different guidance: 1 to 5 mailboxes per domain, 15 to 25 emails per mailbox per day, at least 15 minutes between emails, and warmup kept on after launch.

At InboxKit's recommended 10 to 15 cold emails a day, 100 mailboxes is roughly 1,000 to 1,500 cold emails a day (our arithmetic). Our cold email cost calculator puts that next to domain and sequencer costs.

InfraGuard, placement tests and Email Insights

InfraGuard monitors blacklists, DNS and bounces every 6 hours, with blacklist checks across "50+ providers." The first month is free; the price after that is not published.

Inbox placement tests run one-off or on a schedule, and are available by API. A November 2024 news item said "Early users get tests for just 5 cents each"; the current price is not published.

Email Insights shows workspace and mailbox analytics, including reply and bounce rates. InboxKit's warmup page sets thresholds of under 2% bounce, with critical alerts above 5%. For how sequencers draw these lines, see our guide to email bounce rate.

Sequencer integrations and exports

InboxKit's integration count differs by page: "24+" on the homepage, pricing FAQ, warmup page and about page, "20+" in the homepage comparison table, and "17+" on the tutorials page. The fair summary is that InboxKit says it connects to more than 20 sequencers.

Named tools on the homepage include Instantly, Smartlead, Apollo, Reply, lemlist and PlusVibe. The tutorials page names Instantly, Smartlead, Email Bison, Reply.io, Apollo and lemlist; PlusVibe is not named there.

The full list of supported platforms was not visible on the pages we read. For anything not listed, InboxKit offers a universal app password system for any SMTP-compatible tool. You can check InboxKit's sequencer list inside the app before you order.

How export works

1. Connect your sequencer by entering its login, plus an API key for some platforms.
2. Create an export job once the sequencer shows as "Active."
3. Each mailbox becomes a background export job; mailboxes already in that sequencer are skipped.

The API docs mention per-mailbox weekly export limits; an example response shows 5, but the page does not state it as a rule. If you are choosing a sending tool to pair with InboxKit, our reviews of Instantly, Smartlead and PlusVibe cover each one's warmup and mailbox handling.

API, MCP and agency features

InboxKit's API is well documented. It runs at api.inboxkit.com with JSON, Bearer API keys (Settings, then API & MCP), an X-Workspace-Id header for domain and mailbox calls, and signed webhooks. Mailbox webhooks include login credentials, so InboxKit tells you to use HTTPS.

The MCP server lets Claude query mailboxes, domains, DNS and warmup. For teams that script their infrastructure, this is a real advantage, and you can generate an InboxKit API key from a free account.

For agencies

The agency page lists a multi-client dashboard, bulk Google Workspace creation, and automated DNS and warmup. "White label email" appears only as a keyword; client billing, reseller rules and agency limits are not covered.

The acceptable use policy matters here.

Section 2F bans "Renting, reselling, or providing access to Inboxkit mailboxes without authorization" and "sending on behalf of unauthorized third parties."

InboxKit also runs a "Become a Partner" program for agencies that deliver InboxKit to clients, reviewed by its partnerships team. If you run mailboxes for clients, get written authorization first. Our guide to agency cold email sending infrastructure covers how to structure client domains.

InboxKit pricing explained

InboxKit's pricing page says: "One flat rate. No plans, no base fee, no minimum." The rate is the same at any volume; the only discount comes from the billing cycle.

Setup, DNS and admin panels are included, and very large deployments get custom pricing.

Quarterly billing shows "10% off" on the toggle, but no quarterly price is printed. The homepage comparison table says "$3 per mailbox, flat" while the hero says "from $2.50"; the $2.50 is the annual rate, so both are accurate once you know the billing cycle.

What 10, 50 and 100 mailboxes cost

These are our estimates from list prices, mailboxes only.

Domains are extra. At InboxKit's guidance of 3 mailboxes per domain, 10 inboxes need 4 domains, 50 need 17 and 100 need 34. InboxKit does not publish its domain price, so we cannot total it.

The warmup add-on doubles the mailbox cost, which is why many buyers warm inside their sequencer instead.

Payment, wallet and trial

You top up a wallet by card and each mailbox charges on its renewal date. Agencies and enterprises can ask for volume invoicing on NET-30 terms.

You can open a free account with no card, but "There is no traditional free trial on top of that." The pricing FAQ also says "There is no promo code today."

Refunds and cancellation

InboxKit bills in advance, renews automatically, and says fees are generally non-refundable; domains are never refunded. You can cancel any mailbox from the dashboard before its renewal date, and cancellation takes effect at the end of the period.

• No pro-rata refunds for unused time, including early cancellation of quarterly or annual billing.
• Wallet top-ups are non-refundable, and any balance left at account closure is forfeited.
• Discretionary exceptions: duplicate billing, paid services not provisioned in a reasonable time, a platform-wide outage over 72 continuous hours, termination without cause, and order delays over 48 hours (pro-rata credit for delayed days).
• Requests go to finance@inboxkit.com, with a response in 5 business days and approved refunds in 7 to 10 business days.
• Contact billing before any chargeback; the terms add that unauthorized chargebacks can lead to suspension and forfeited wallet credits.

When you are ready to price your own setup, open the InboxKit pricing calculator in the app and compare it with the cost tables in our InboxKit pricing guide.

Google, Microsoft and InboxKit: what the policies say

No official Google or Microsoft document names InboxKit or cold email mailbox vendors. Here is what the official documents do say, as of November 13, 2026.

Google Workspace

The Google Workspace terms of service bar customers from reselling the service (Section 3.3(c)) and from "creating multiple Customer Accounts to simulate or act as a single Customer Account" to avoid fees. Google runs a separate reseller program with its own terms; whether InboxKit is an authorized Google reseller is not something we could verify.

The Google Workspace acceptable use policy (last modified October 12, 2026) prohibits using the services "to generate, distribute, publish or facilitate unsolicited mass email, promotions, advertisements, or other solicitations." It also bars creating Workspace accounts "assigned to business functions rather than to human beings."

Microsoft 365

Microsoft's outbound spam protection page says "using Microsoft 365 to send bulk email isn't a supported use of the service, and is permitted only on a 'best-effort' basis." Accounts that send spam past "an undisclosed limit" are blocked from sending.

Microsoft also applies a tenant-wide external recipient limit that scales with license count, and new tenants get only part of that quota in their first 60 days. A separate per-mailbox limit of 2,000 external recipients a day was cancelled in January 2026.

What InboxKit says

InboxKit says it provisions official, paid licenses as a reseller and makes customers responsible for following provider terms and anti-spam law. Its terms say it "is not responsible for the suspension or health of their email accounts" (Section 8).

A knowledge base notice updated April 1, 2026 says Google is enforcing against "non-profit, legacy, and educational panels," and that InboxKit's accounts are unaffected because it uses "official, fully paid Google Workspace licenses." It cites no Google source.

A separate InboxKit article says suspended accounts are "rarely recoverable." No page we read says whether InboxKit replaces or refunds suspended mailboxes.

None of this means these setups are approved or risk-free. Read the provider terms yourself and keep volume and complaints low.

InboxKit's own rules on cold email

InboxKit markets to cold email operators, and its terms and acceptable use policy require opted-in recipients. Both are true, and readers doing cold outreach should read the policy themselves.

• Terms 9.1 and 9.2: customers must obtain "proper consent from email recipients" and are "strictly prohibited from using the services to send unsolicited bulk emails."
• Terms 11 and 3.2: a clear opt-out in every email, and compliance with CAN-SPAM and GDPR.
• Terms 3.3: do not violate "the terms of service of third-party email providers."
• AUP 2A: bans "Sending unsolicited bulk email or spam to recipients who have not explicitly opted in" and "Sending email to purchased or harvested email lists."
• AUP 4: permits "Opted-in sales and business development campaigns."
• AUP 3: DKIM is mandatory, and you must stop mailing unengaged addresses.

Enforcement runs from a warning to suspension, and in severe cases "Immediate account termination without refund." If you send to sourced B2B contacts, verify every address and keep your list tight. Our roundup of the best email verification tools covers the cleaning step.

Results claims: what InboxKit says

InboxKit's inbox placement figures differ by page: "90%+" on the homepage, about page and comparison table, "95%" in a UI mockup, the Google Workspace hero and the agency headline, and "97%+ inbox placement after warmup" on the warmup page. No methodology is published, and we do not treat any of them as fact.

The warmup page also says that without warmup "deliverability is said to be under 30%," and that 80% of campaign failures come from infrastructure rather than copy. These are InboxKit's statements without cited studies.

The homepage shows customer testimonials with reply-rate and volume figures. They are individual customer anecdotes, not measured results, and your outcome depends on your list, copy and volume far more than on any mailbox vendor.

InboxKit ratings

As of November 13, 2026, G2 showed InboxKit at 4.6 out of 5 from 138 reviews. InboxKit's own site displays 4.7 on G2 (with 120 reviews in its comparison table) and Spring 2026 G2 High Performer badges; we use the figure we fetched from G2.

Our Trustpilot fetch failed and we found no Capterra listing, so we do not report ratings from either. We did not retrieve review themes, so we do not summarize what reviewers say.

InboxKit vs Icemail

Icemail is InboxKit's closest like-for-like competitor, and Nerdy Joe is an affiliate of both, so here are the plain facts.

Icemail lists Google Workspace and Microsoft 365 mailboxes at $2.50 per mailbox a month, shown as a "limited deal" against $3.50, with no annual discount published. InboxKit is $3 monthly or $2.50 on annual billing.

For Azure, Icemail charges $29 to $30 per domain (up to 100 mailboxes), against InboxKit's $30 per tenant. Icemail also sells IMAP/SMTP mailboxes on a dedicated IP, which InboxKit does not list on its pricing page.

Icemail's terms name Xquare Labs LLC in San Francisco; InboxKit's name Enrich Labs L.L.C-FZ in Dubai. Icemail describes its Google mailboxes as licensed Google Business Starter mailboxes on US IPs, and says it is a Google partner, which we could not verify either. InboxKit publishes its DNS defaults, API limits and warmup weighting in more detail.

Our side-by-side InboxKit vs Icemail comparison gives a verdict by use case, and our Icemail review covers Icemail on its own terms.

InboxKit alternatives

Prices below are each vendor's list price as of November 2026, mailboxes only, monthly billing unless noted.

For the self-serve options, see each vendor's own page: Zapmail, Mailforge, Infraforge and Maildoso. Mailforge, Infraforge and Maildoso sell their own infrastructure rather than Google or Microsoft mailboxes, so compare like with like.

Smartlead's SmartSenders is worth a note: it resells InboxKit mailboxes inside Smartlead at $4.50 per mailbox a month plus $13 per domain a year, described as "exclusive to Smartlead and non-transferable." That costs more per mailbox than buying direct, but the domain price is published. Instantly's done-for-you accounts cost $5 per account a month, and Instantly says that is about 20% less than buying from Google.

Our full list of InboxKit alternatives covers ten options by use case, with when to stay with InboxKit.

InboxKit pros and cons

Pros

• Low flat price ($3 monthly, $2.50 annual) with no minimum, base fee or setup fee.
• Google Workspace, Microsoft 365, Azure and pre-warmed options in one dashboard.
• Automated SPF, DKIM (2048-bit), DMARC and MX with SPF merging and 6-hourly monitoring.
• Sequencer export built in, plus app passwords for any SMTP tool.
• A documented REST API with webhooks, published rate limits and an MCP server.
• Self-serve cancellation from the dashboard, and written refund exceptions for long outages and delays over 48 hours.
• G2 rating of 4.6 from 138 reviews as of November 13, 2026.

Cons

• The acceptable use policy ties Google mailboxes to regional distribution arrangements for India and steers customers elsewhere to Microsoft 365 or Azure.
• A reseller model; the terms do not say who owns the tenant or licenses, and InboxKit disclaims responsibility for suspensions.
• Warmup costs extra and doubles the mailbox price.
• Domain prices are not published, and domains are never refunded.
• Billed in advance with no pro-rata refunds; wallet balances are forfeited at closure.
• Terms require opted-in recipients and ban purchased lists, which sits awkwardly with cold outreach marketing.
• InboxKit's own figures conflict on placement, integration counts and warmup ramp.
• Full DNS automation only on Cloudflare; InfraGuard and placement test prices not published.

InboxKit verdict by use case

How to get started with InboxKit

These are the steps InboxKit documents. We did not run them ourselves.

1. Sign up free. Create an account with no card and top up your wallet.
2. Choose platform and quantity. Pick Google Workspace, Microsoft 365, Azure or pre-warmed. If you are outside India and want Google, confirm the India clause first.
3. Connect or buy domains. Connect Cloudflare by API for full automation, or change nameservers. Wait for the domain to show as active.
4. Create mailboxes. Keep to 3 mailboxes per domain, and remember all mailboxes on a domain must share a platform.
5. Decide on warmup. Add InboxKit's $3 add-on or warm inside your sequencer for about 14 days.
6. Export to your sequencer. Connect the sequencer, wait for "Active," and create an export job.

Before you launch, set a calendar reminder for renewal dates, since cancellation must happen before each mailbox renews. When you are ready, start with a small batch of InboxKit mailboxes and scale once your first domains look healthy.

How we compiled this review

We did not use InboxKit hands-on. Where InboxKit's own materials disagree, we say so instead of choosing a figure.

Rather not build the list yourself?

Mailboxes are one piece. Building and verifying the list, writing copy, watching placement and handling replies is a weekly job.

Nerdy Joe is owned by Agency Growth Partners (AGP), and AGP builds verified lists and runs outbound for agencies. If you would rather hand that off, book a call with David. You can also see how the pieces fit in our agency growth machine overview.

Verdict

InboxKit does the infrastructure job well on paper: a low flat price, Microsoft 365 and Azure options, careful DNS automation, sequencer export and an API that agencies can build on.

The fine print deserves as much attention as the features. The India clause on Google mailboxes, the reseller model, strict refund rules and opt-in requirements all sit in documents that most buyers skip.

If you want Microsoft 365 or Azure mailboxes at a low rate, InboxKit is worth a close look. Open a free InboxKit account, ask support about anything in the policy that affects you, and start with a few domains before you scale. If Google mailboxes are a must and you are outside India, compare InboxKit's answer with Icemail before you commit.

Disclosure: My relationship with Instantly is that of an independent party. I do not hold any position, nor do I have the power to form binding agreements or act on behalf of Instantly. My earnings are derived from referral compensations provided by Instantly. The views I share are solely mine and should not be seen as official statements, promises, or representations of Instantly, or any related entities or personnel.

Sources

• InboxKit homepage
• InboxKit pricing
• InboxKit about
• InboxKit terms of service
• InboxKit acceptable use policy
• InboxKit email warmup
• InboxKit Azure mailboxes
• InboxKit agency email solution
• InboxKit tutorials
• InboxKit affiliates
• InboxKit knowledge base: Google Workspace accounts
• InboxKit knowledge base: DNS management
• InboxKit knowledge base: Google disruption
• InboxKit knowledge base: Google suspension
• InboxKit API docs
• InboxKit API quick start
• InboxKit API: export mailboxes
• InboxKit API: list sequencers
• Smartlead help: Google and Outlook mailboxes by InboxKit
• Smartlead help: SmartSenders pricing
• Instantly: email accounts
• Icemail pricing
• Icemail terms
• Zapmail pricing
• Mailforge pricing
• Infraforge pricing
• Maildoso pricing
• Google Workspace terms of service
• Google Workspace acceptable use policy
• Google: Email sender guidelines
• Google: Gmail program policies
• Microsoft Learn: Outbound spam protection
• Microsoft Tech Community: Exchange Online tenant outbound email limits
• Microsoft Tech Community: External recipient rate limit update
• GMass: Warmup shutting down
• G2: InboxKit reviews