MailReach Review (2026): Warmup, Spam Test, Pricing and Who It Fits

MailReach is a good pick if you want email warmup and inbox placement testing from one specialist tool that works with nearly any mailbox and any sending tool. It is a weaker pick if your sequencer already includes warmup for unlimited mailboxes, because MailReach charges per mailbox. As of November 2026, a single mailbox costs $25 a month, and MailReach's own blog lists $19.50 and $18 per mailbox at higher volumes.

Some tool links here are affiliate links (disclosure). Nerdy Joe is a MailReach affiliate. If you want to look at the tool before reading further, you can see MailReach's plans and free spam test.

Nerdy Joe is a certified Apollo.io Managed Services Partner and a PlusVibe Certified Silver Partner. We did not test MailReach hands-on for this review and we have no placement data of our own. Everything below comes from MailReach's website, help center, API docs and terms, plus Google's published sender documents and each competitor's own site, with sources at the end.

MailReach review: the short verdict

MailReach does two jobs. It warms mailboxes by running automated conversations with a network of inboxes, and it runs seed-list spam tests that show where your real email lands at Google, Microsoft and Yahoo. Every warmup plan includes at least 20 spam test credits, so the two jobs come in one subscription.

The trade-offs are plain. MailReach is not a sequencer, the cost grows with every mailbox you add, no free trial of the warmer is advertised, and the full price table is not on the pricing page.

All MailReach prices in this review are as of November 2026. The tier figures come from MailReach's own blog, not the pricing page slider, so confirm the current rate in MailReach's checkout before you budget.

What MailReach is

MailReach describes itself as an email deliverability tool focused on inbox placement. Its homepage names these products: Email Warmup, Spam Checker, Co-pilot, Email Verifier, a free spam test, an Email Warmup API, a Spam Test API, and free SPF and DKIM checkers.

It is not a cold email platform. No page we read describes campaign sending, sequences, a lead database or a CRM.

The company behind it

The company behind MailReach, The Brain Company, is registered in Paris, France (per MailReach's terms). The terms are governed by French law, and the French version prevails if the two versions differ.

MailReach says thousands of businesses use it (its pages cite both 3,000+ and 4,000+). We could not verify a founder name, founding year, headcount or funding from the pages we read, so we leave them out.

Who MailReach is for, and who it is not for

MailReach sits beside your sending tool, not in place of it. MailReach names its audience as B2B CEOs, lead generation agencies, B2B marketers, recruiters and B2B salespeople.

MailReach is a good fit if:

• You send B2B cold email from Google Workspace or Microsoft 365 mailboxes and want warmup that does not depend on your sequencer.
• You send through a tool with no built-in warmup, such as a CRM, a plain mailbox or an SMTP service like SendGrid, Mailgun or Amazon SES.
• You want placement tests and warmup in one bill, with Slack alerts when a score moves.
• You are repairing a mailbox or domain that started landing in spam.

MailReach is probably not the right fit if:

• You already pay for Instantly, Smartlead, PlusVibe or lemlist, which include warmup with the sending plan, and you run dozens of mailboxes.
• You send B2C newsletters or ecommerce promotions, or want to warm a personal Gmail account. MailReach says it is not for those uses.
• You need white label reports or separate client logins, which MailReach does not advertise.
• You expect warmup alone to rescue poor copy or a bought list. MailReach says it cannot.

How MailReach email warmup works

You connect a mailbox, MailReach adds it to its network, and automated conversations start between your mailbox and network inboxes. According to MailReach, warming emails are opened, marked as important, pulled out of spam if they land there, and replied to positively. The conversations run over several messages, not single sends.

MailReach says it does not use canned templates or bots for these conversations. It also says it warms the mailbox, its domain and the associated IP together, and that every address on a shared domain or IP should be warmed.

Where the warmup emails go

MailReach creates a folder named "To Follow" in Gmail, Google Workspace, Outlook or Office 365, where sent and received warming emails are stored. Its help center says about 99% of received warming emails are hidden automatically after several seconds, though some, such as automatic replies, cannot be hidden.

The warmup network

MailReach says its network has 30,000+ inboxes, describes them as real human inboxes, and says they are mainly Gmail (Google Workspace) and Outlook (Office 365) accounts. It also says the network's average reputation score is above 95 out of 100. These are vendor claims with no independent audit that we could find.

What MailReach does not publish matters too. It does not explain who owns the network inboxes, how members are screened, or the exact provider mix, beyond saying that connected addresses are added to the network.

Supported mailbox providers

MailReach says it works with any provider that supports SMTP. It names Gmail and Google Workspace, Outlook and Office 365, Zoho, Brevo, Mailjet, Mailgun, SendGrid, Amazon SES, Sparkpost, Ionos and OVH, and its help center adds guides for Resend, GoDaddy, email aliases and custom SMTP with IMAP.

The Workspace bulk method has the customer create their own Google Cloud project and service account. We describe the documented setup only, and make no claim about how Google views it.

Volumes and ramp-up

The default mode is called Autopilot. MailReach's help center says it is normal to see only 1 warming email on day one, and that Autopilot then raises daily volume gradually to around 40 to 50 emails.

A June 2026 MailReach blog post puts the Autopilot pace at 50 warmup emails a day per inbox, reached by day 14. The marketing cap is up to 100 warming emails a day, which MailReach says can be used to repair a damaged reputation.

You can switch Autopilot off and set "Max sends per day" and "Starting volume" by hand. Both are measured in conversations, not emails, and the maximum is 35 conversations, which MailReach says equals about 77 to 105 emails a day.

MailReach does not disclose its algorithm, and we found no documented setting for reply rate.

What MailReach leaves out on purpose

MailReach says it does not offer template warmup (warming with your real campaign copy), industry-specific warmup or local-language warmup, and argues these have no positive effect on reputation. Other vendors disagree: lemwarm sells warmup of your real templates on its higher plan. If that feature matters to you, MailReach will not provide it.

MailReach's sending guidance

MailReach's help center is specific about how to behave while warming. These are its recommendations, not our test results.

• Warm a new mailbox or domain for at least 14 days with no campaigns, then keep warmup on during and between campaigns.
• Send no more than 100 cold emails a day per address, with 120 as an absolute ceiling and 80 or fewer being better.
• Use one sending address per domain.
• Send a maximum of 2 follow-ups, at least 3 days apart.
• Keep your bounce rate below 5%.

For the wider setup around these limits, our guide to cold email infrastructure covers domains, mailboxes and DNS.

Repairing a damaged reputation

MailReach claims reputation restoration is possible in 90% of cases. It says recovery takes several weeks, or several months for heavily damaged domains, and it tells users to stop campaigns on the domain while it recovers.

Its spam spike guide says to reduce or pause sending, cut complaints and bounces, and only then raise warming volume. MailReach's own summary is that it gives a boost but cannot fix bad sending practices.

The Reputation Score: what it tells you and what it does not

Each connected mailbox gets a Reputation Score out of 100, delivered 72 hours after you connect. MailReach's success guide says the score is based entirely on where your warming emails land, that recent days weigh more, and that Google Workspace and Office 365 placement counts more than smaller providers.

MailReach shows scores below 60 in red, treats 90 or higher as the target, and says a sustained 95 or higher means your volume is fine.

Here is the part buyers most often miss. MailReach says the Reputation Score is not an indicator of whether a mailbox is ready for campaigns. It measures warming emails sent to network inboxes, not your real campaign emails sent to real prospects.

MailReach's help center adds that you can have a perfect reputation score and still land entirely in spam, because content and sending setup also count. It says that in 80% of such cases the cause is links and tracking without a custom tracking domain (its claim).

So read the score as a health signal for the mailbox, and use a spam test to judge an actual campaign. The dashboard graph of where warming emails land can be filtered by Google, Microsoft and other providers, and an overview by domain, tag and provider appears once you connect 6 or more accounts.

Health checks and alerts

The All-In-One plan lists domain and inbox health checks covering blacklists, SPF, DKIM and DMARC. Which blacklists are checked, and how often, is not documented on the pages we read, and a 2022 MailReach help article says MailReach cannot remove you from a blacklist.

Alerts go to Slack or to a webhook URL. MailReach's API docs list 11 events, including a reputation score drop or rise, a disconnected account, a connected domain nearing expiration, an account sending too many messages, missing expected emails, and a completed scheduled spam test.

Blacklist changes are not in that event list, so do not assume real-time blacklist alerts without asking support.

MailReach spam test: the inbox placement tool

The spam test is a seed-list inbox placement test. You send your real email to a list of MailReach inboxes and get a report showing where it landed, plus content and setup checks. If the term is new to you, our guide to the inbox placement test explains seed lists and how to read results by provider.

MailReach says its test uses 30+ mailboxes across Google, Microsoft and Yahoo. It argues that sending to the full list yourself is more reliable than tools where you send to a single address that forwards the message.

What the test checks

The report gives a score, placement by mailbox and prioritized recommendations. You can set scoring to match your audience: Professional (Google Workspace and Microsoft 365), Personal (Gmail.com, Outlook.com, Hotmail) or All.

How to read the score

MailReach's free tool describes the score out of 10; its API returns a 0 to 100 score. MailReach does not document how the score is calculated, so we will not guess. Its deliverability test page treats an inbox placement rate of 90% or more as strong.

If every check is green but the score is low, MailReach points to sending reputation, spam words it did not detect, or the sending tool's IP and tracking domain. It suggests re-testing with a short, two-sentence plain email sent without a sending tool to isolate the cause.

Free vs paid tests

MailReach says a test does not harm your sender reputation. It recommends testing from the same sending tool, domain and content as the real campaign, and re-testing when content, links, images or setup change.

Two things are not documented: the frequency options for automated tests, and whether each automated run uses one credit. The API docs say most tests complete within 3 to 5 minutes.

Our walkthrough of the MailReach spam test covers the documented steps and what to fix afterward. You can also run MailReach's free spam test on your next campaign email before you pay for anything.

Where the spam test falls short

The seed list is 30+ mailboxes centered on Google, Microsoft and Yahoo. Coverage of regional providers is not documented, and MailReach's own blog says GlockApps covers more regional providers.

A placement test is also a sample, not a guarantee. It is one layer of a pre-send routine, and our guide to the email deliverability test lays out the full stack, from authentication and blacklist checks to content checks with our free spam word checker.

Other MailReach features

Co-pilot and Autofix AI. MailReach describes Co-pilot as an AI deliverability assistant that analyzes your content and sending activity and suggests best practices, and its blog says it is included in the All-In-One plan. The agency page also mentions "Autofix AI", which identifies spammy elements in content. MailReach publishes little detail on either.

Email Verifier. The homepage names an Email Verifier that cleans lists to reduce bounces, but we found no pricing, limits or method for it. If list cleaning is your main need, compare the best email verification tools first.

Free SPF and DKIM checkers. These are not domain lookup forms. You insert a code in an email and send it to MailReach's test addresses, and the report also covers DMARC, blacklist status, reverse DNS and MX records.

API and MCP. MailReach has a REST API for warmup and spam tests, and says API usage has no extra cost beyond connected inboxes and test credits. Numeric rate limits were not readable when we checked, and no SDKs are mentioned. The docs also expose an MCP server, but it only searches the API documentation and does not run warmup or tests.

MailReach pricing explained

MailReach's pricing page is a slider, and it exposed only some figures when we read it on November 10, 2026. The tier table below comes from MailReach's own blog post dated June 2026, supported by a second MailReach post from the same month. Our MailReach pricing breakdown goes through every plan and add-on in more detail.

The pricing page has two products. All-In-One is the warmer plus the spam tester, and Spam Tester is spam test credits only. Billing can be monthly, annual (20% off) or pay as you go.

Warmup pricing per mailbox

MailReach's pricing page shows $19.50 per mailbox a month at volume, and MailReach's own blog lists $25 per mailbox for 1 to 5 mailboxes, $19.50 for 6 to 20 and $18 for 21 to 50, as of November 2026. Annual billing takes 20% off.

The live slider has stops at 1, 20, 40, 60, 80 and 100+ mailboxes, which do not line up exactly with the blog's tiers. We could not read the per-mailbox price at each stop, so treat the slider as the final word. Prices are in US dollars and exclude tax.

What a typical setup costs

These are our estimates from the blog tier table. MailReach's blog prices 10 inboxes at $195 and 20 at $390, which implies the tier rate applies to every mailbox, not only the extra ones.

Notice the 6 mailbox row. If the tier rate applies to all mailboxes, 6 mailboxes at $19.50 cost less than 5 at $25, so check the slider at both counts.

To put warmup next to mailbox, domain and sequencer costs, our free cold email cost calculator adds up the whole stack.

Spam test credits

One credit is one inbox placement test with a report, and every warmup plan includes at least 20. The one pack price we could read is 200 credits for $210 a month, which works out to $1.05 per test by our math.

The entry price for the standalone Spam Tester is not consistent across MailReach's own posts. MailReach's blog cites a starting price between $15 and $19.50 a month, so check the slider.

We could not verify pay-as-you-go pack prices, other pack prices, or whether unused credits expire or roll over. Ask MailReach before you buy a large pack.

Discounts, agency pricing and what is not published

On November 10, 2026, the pricing page showed an Autumn Sale banner offering 20% off the first 30 days of warming your first mailbox. No end date was shown, so treat it as temporary and not as the standard price.

Large accounts get a custom quote through a contact form, and agencies are pointed to a "Get Agency Pricing" form. No agency figures are published.

Free trial, refunds and cancellation

No free trial of the warmer is advertised on the pricing page, in the terms or on the blog, and there is no permanent free warmup plan. The free part of MailReach is the spam test.

The terms say MailReach bills monthly in advance by credit card, and a month that has started is not refunded. You cancel by disconnecting your email accounts in the app, and the cancellation applies from the following month.

The terms do not describe refunds on annual plans or credit packs, so ask before you pay for a year. If the numbers work for your mailbox count, you can build your plan in MailReach's pricing slider and see the exact total.

MailReach and Google: where warmup stands

Any honest warmup review has to cover this. Here is what the published sources say, as of November 10, 2026.

Google's email sender guidelines recommend increasing sending volume slowly, starting with engaged recipients, and avoiding sudden spikes. They 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, and it closed that feature on January 31, 2023. Growbots said its warmup would stop for Google accounts later that year. Both are third-party accounts: neither post quotes Google's message, and we did not find a public statement from Google about those events.

Other vendors kept operating: lemwarm says it has been IMAP-based since August 2022, and Smartlead's help center said in 2023 that the warning affected apps verified for listing with Google.

MailReach says Google has not banned warmup and that it follows provider rules. Its blog says Google asked officially audited apps that warmed through the Google API to stop.

Google has not published a position on warmup networks specifically, so treat automated warmup as a practice Google neither endorses nor explicitly names. How Google applies its general policies to warmup networks is not published.

What this means for you

• MailReach's terms put compliance with your email provider's terms on you, the customer, so the risk sits with the account owner.
• Warmup engagement comes from network inboxes, not from real prospects. Google's stated spam rate thresholds (below 0.10%, and never 0.30%) apply to complaints from real recipients, which warmup does not change.
• MailReach's help center says Google Workspace can suspend accounts it considers at risk, with spam complaints and too many emails per day among the top causes. The article does not say warmup causes suspensions.

If you use warmup, keep cold volume modest, keep complaints low, and do not treat a warmup score as a license to send more.

Results claims: what MailReach says

MailReach's homepage cites 137% average reply rate growth and 19% average revenue growth from email for its customers, and it claims reputation restoration is possible in 90% of cases. No methodology is given, and we found no independent audit of these claims.

The testimonials on MailReach's site are individual anecdotes, not benchmarks. Your outcome depends on your list, copy, volume and domain history far more than on any warmup tool.

MailReach for agencies and deliverability consultants

MailReach's agency page lists one overview page for every client's sender reputation, a Reputation Score per domain, tag or provider with the change over the last 48 hours, and tags to group mailboxes by client. It also lists Slack and webhook alerts, automated spam tests, bulk connection of Google Workspace accounts, both APIs and help with account migration.

For consultants, MailReach describes two models. You can link clients' mailboxes to your own account and manage them from your dashboard, or clients can sign up for their own accounts through your referral link.

The terms clause agencies should read

There is a point agencies should check before building a service on MailReach. MailReach's terms of use say customers may not transfer the Services to their own customers, while its consultant page describes managing client mailboxes inside your own account.

Those two statements may be compatible in practice, and we are not interpreting the contract here. If you plan to resell warmup or bundle MailReach into a client retainer, ask MailReach in writing how the clause applies to your setup.

MailReach also does not advertise white label, client logins, per-client workspaces or team roles, so client-facing reporting is something you would build yourself.

For how warmup fits a multi-client setup, see our guides to agency cold email sending infrastructure and mailbox warmup and inbox placement. Agencies can also review MailReach's agency features and request a quote there.

MailReach integrations

MailReach documents Slack alerts, webhooks, a REST API, and mentions of Zapier and Make on its API pages, whose triggers and actions we could not verify. It documents no native integrations with sequencers or CRMs. It connects to the mailbox itself, so in our reading it works beside any sending tool that uses that mailbox.

How MailReach fits with Instantly, Smartlead, PlusVibe and lemlist

This is the main buying question, because the popular sequencers already include warmup.

When MailReach adds little. If you send through Instantly, Smartlead or PlusVibe, warmup for unlimited mailboxes is part of your sending plan. Paying $18 to $25 per mailbox for a second warmup network is hard to justify at 30 or 50 mailboxes.

When MailReach adds something. The spam test is independent of your sequencer, so it gives you a second opinion on placement that does not come from the vendor whose tool you are grading. The Spam Tester product can be bought without warmup for that purpose.

When MailReach is the main option. If you send from a CRM, a plain mailbox or an SMTP service with no warmup built in, a standalone tool is how you get warmup at all. In that case, MailReach's All-In-One plan covers warmup and testing together.

Our reviews of Instantly, Smartlead, PlusVibe and lemlist cover each sequencer's built-in warmup in detail.

MailReach vs the main alternatives

Prices below are from each vendor's own site, checked November 10, 2026, on monthly billing unless noted. Our full list of MailReach alternatives covers more tools by use case.

This is list-price arithmetic only. Daily volumes, network quality and included testing differ by vendor.

Standalone warmup tools

Warmup Inbox is the low-cost per-inbox option at $15 a month for 75 warmup emails a day, with a 7 day trial. Warmbox has a Solo plan for 1 inbox and 50 warmup emails a day, and its page shows two unlabeled price sets ($15 and $19), so confirm which is monthly.

lemwarm costs $29 per address on Essential and $49 on Smart, and it is included with every lemlist plan, so lemlist users already have it. Mailwarm starts at $79 a month for 1 mailbox and includes deliverability expert calls.

Mailivery has a flat $29 Starter plan for unlimited mailboxes with a shared pool of 200 warmup emails a day. Warmy lists plans from $49 a month without publishing mailboxes or daily volumes per plan, and Folderly shows $96 per mailbox a month on yearly billing.

Warmup built into sequencers

Instantly includes unlimited email accounts and unlimited warmup on all its Outreach plans, starting at $47 a month for Growth. Smartlead says all plans include unlimited email accounts at no extra cost, starting at $39 a month for Base.

PlusVibe starts at $37 a month for Personal with Basic warmup. Placement testing is an add-on in these tools: Smartlead's SmartDelivery starts at $49 a month, and PlusVibe's Email Placement Test starts at $19 a month for 300 credits.

So the fair comparison is not only the warmup fee. MailReach bundles 20 placement tests with warmup, while the sequencers bundle warmup with sending and charge for placement tests.

Placement testing tools

GlockApps is a dedicated tester with a free tier of 2 spam test credits and paid plans from $59 a month for 360 credits. Mail-Tester is the simple free check: send to one generated address and get a score out of 10, which tests the message and sending server but not placement across providers.

MXToolbox sells a Delivery Center plan at $129 a month with 30 inbox placement tests. Google's Postmaster Tools reports spam rate and reputation for real mail sent to personal Gmail accounts, which makes it a complement to seed tests, not a substitute.

For a ranked view of the warmup category, see our list of the best email warmup tools.

MailReach ratings on review sites

We fetched these on November 10, 2026; treat them as a snapshot.

The scores are high and the review counts are small. We use only the numbers fetched from the review sites themselves, and we did not retrieve review themes, so we do not summarize what reviewers say.

MailReach pros and cons

Pros

• Warmup and seed-list placement testing in one subscription, with at least 20 test credits on every warmup plan.
• A free spam test, up to 3 a day, with no credit card.
• Works with Google Workspace, Microsoft 365 and any SMTP provider.
• Independent of your sending tool.
• Placement scoring by audience: professional inboxes, personal inboxes or both.
• Bulk connection, Slack and webhook alerts on 11 events, and an API at no extra charge.
• A help center that states plainly what warmup cannot do.

Cons

• No sequencer, lead database or CRM, so you always need a sending tool.
• Per-mailbox pricing, while Instantly, Smartlead and PlusVibe include warmup in the sending plan.
• The full tier table appears only in MailReach's blog, not on the pricing slider.
• No free trial of the warmer is advertised, and a started month is not refunded.
• Built for B2B, with fewer personal inboxes in the network (MailReach's own statement).
• The Reputation Score reflects warming emails, and MailReach says it is not a readiness indicator.
• No white label or client workspaces advertised, and the terms restrict transferring the service to your own customers.
• Network ownership and screening are not published, and results claims have no published methodology.

MailReach verdict by use case

How to get started with MailReach

These are the steps MailReach documents on its own pages and help center. We did not run them ourselves.

1. Run the free spam test first. Paste MailReach's code into your email body, send the email to the full list of seed inboxes from your real sending tool, then click "Get your score".
2. Sign up and choose a plan. Pick the All-In-One plan, set your mailbox count in the slider, and check the total.
3. Connect a mailbox. For a Google mailbox, turn on 2-Step Verification, create an App Password, and enter it in MailReach's Connect screen. IMAP must be enabled.
4. Leave Autopilot on. For a new mailbox or domain, MailReach says to change nothing.
5. Check the dashboard after one day, and read the Reputation Score after 72 hours.
6. Wait at least 14 days before any campaign, then keep warmup on and spam test each new campaign.

When you are ready, create your MailReach account and connect one mailbox before you commit a whole team.

How we compiled this review

We built this review from MailReach's website, pricing page, blog, help center, API docs and terms as of November 10, 2026. The Google section uses Google's own sender guidelines and policies, plus posts from GMass, Growbots, lemwarm and Smartlead. Competitor prices come from each vendor's own site, and ratings come from G2, Capterra and Trustpilot on the same date.

We did not use MailReach hands-on, and we did not run warmup or placement tests. Where MailReach's own materials disagree, such as the spam score scale, we say so.

Rather not build the list yourself?

Warm mailboxes are one piece. Picking accounts, building and verifying the list, writing copy, watching placement and handling replies is a weekly job before a single meeting is booked.

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 read how the system fits together in our agency growth machine overview.

Verdict

MailReach is a focused deliverability tool. It pairs automated warmup with a seed-list spam test, works with nearly any mailbox, stays independent of your sequencer, and documents its own limits more openly than most vendors.

It is not the cheapest way to warm a large fleet of mailboxes, and it is not a sending tool. There is no advertised warmup trial, the Reputation Score is not a campaign readiness signal, and agencies should clear the terms clause before reselling.

If you run a handful of B2B mailboxes, send from a tool without warmup, or want placement tests you can trust across sending tools, MailReach is worth a close look. Start with MailReach's free spam test, read the report on a real campaign email, and decide on warmup from there.

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.

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