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arcinbox.

Cold email infrastructure that keeps your mailboxes healthy

Buy Google and Microsoft mailboxes, stop bad emails at send time,
and see what broke.

  • No setup fee
  • Nothing to install
  • Works with any sequencer
AAcmeOverviewFleetDomainsMailboxesWarmupArcWatchSequencersWorkspaceAPI keysBillingTeamHelpDocumentationSRSam RiveraOverview25,236 mailboxes on 8,412 domains, watched all day.Buy domainsUse my domainsReplace mailboxesExport to a sequencerAPI docsacmemail.example, getacme.exampleSending now21,904of 25,236 mailboxesChecked today412,860before they leftStopped before sending988none reached an inboxDomains listed6of 8,412 watchedEmails checked7D30D3M0200K400KSep 26TodayGoogleMicrosoftNeeds attention5 open152Mailboxes41 suspended by GoogleFlagged in the last 24 hoursReplacing free96 disconnected from SmartleadThe Smartlead login expiredReconnecting15 blocked at sign-inMicrosoft asked to verify themReview84Domains78 failing DNS checksAn SPF, DKIM or DMARC record is missingFix DNS6 on a blacklistListed in the last 7 daysViewDomainsEvery sending domain, checked all day.Buy domainsAll 8,412Passing 8,328DNS failing 78Listed 6Warming 880All 8,532Passing 8,328DNS failing 78Listed 6Warming 880Search all domains120 new domainsRegisteringPublishing recordsReady for mailboxesacmereach.exampleSPFSPFDKIMDKIMDMARCDMARCMXMXacmeflow.exampleSPFSPFDKIMDKIMDMARCDMARCMXMXacmedesk.exampleSPFSPFDKIMDKIMDMARCDMARCMXMXAnd 117 more, set up the same wayDomainProviderMailboxesStatusLast checkgetacme.exampleGoogle3Passing10:41tryacme.exampleGoogle3Listed10:38acmehq.exampleMicrosoft3DNS failing10:35meetacme.exampleGoogle3Warming, day 15 of 2110:32joinacme.exampleAzure3Passing10:29hiacme.exampleMicrosoft3Passing10:26useacme.exampleGoogle3Passing10:23Mailboxes25,236 mailboxes across Google, Microsoft, Azure and custom SMTP.Buy mailboxesAll 25,236Sending 21,904Warming 2,640Paused 18MailboxProviderSequencerStatusjo@getacme.exampleGoogle WorkspaceSmartleadSendingmaya@tryacme.exampleGoogle WorkspaceSmartleadPaused, 46 heldkim@acmehq.exampleMicrosoft 365InstantlySendingdana@meetacme.exampleGoogle WorkspaceSmartleadWarming, day 15 of 21lee@joinacme.exampleAzure tenantEmailBisonSendingana@getacme.exampleGoogle WorkspaceInstantlySendingmax@hiacme.exampleMicrosoft 365PlusVibeSendingtom@sendacme.exampleCustom SMTPSmartleadSendingArcWatchEvery mailbox and domain watched all day, with the cause and the fix for each problem.Watching25,236mailboxes on 8,412 domainsOpen problems54321Each with its causeHandled today3738394041Fixed or healedStopped before sending988None reached an inboxProblemsNewest first, each with what ArcWatch didReplacingReplaced, in Smartlead41 mailboxes suspended by GoogleFlagged at 09:12. Replacements are free.ReconnectingReconnected96 mailboxes lost their Smartlead loginThe login expired at 07:05.Paused, 46 heldResumed, 46 sentmaya@tryacme.exampleBounces from its last list ran high.Fix DNSFailingFixing78 fixed78 domains failing DNS checksAn SPF, DKIM or DMARC record is missing.Needs new copygo.quicklink.example listed812 emails carrying it were stopped before sending.Send check412,860 checked today, 988 stopped before sendingLink to a listed domaingo.quicklink.example812Link to a listed domaintrk.northpeak.example176Held while the mailbox recovers18 paused mailboxes296Smartlead562Instantly301EmailBison125New orderORD-2292, 360 mailboxes on 120 domains across four providers, sent to Smartlead when ready.Google Workspace30 domains, 90 mailboxesGoogle Workspace ready30 domains verified90 mailboxes createdUsernames and photos setConnected to SmartleadVerifying domainsCreating mailboxesConnecting SmartleadReady, warmingMicrosoft 36530 domains, 90 mailboxesMicrosoft 365 ready30 domains verified90 mailboxes createdUsernames and photos setConnected to SmartleadVerifying domainsCreating mailboxesConnecting SmartleadReady, warmingAzure tenants30 domains, 90 mailboxesAzure tenants ready30 domains verified90 mailboxes createdUsernames and photos setConnected to SmartleadVerifying domainsCreating mailboxesConnecting SmartleadReady, warmingCustom SMTP30 domains, 90 mailboxesSMTP servers ready30 domains verified90 mailboxes createdSender names setConnected to SmartleadVerifying domainsCreating mailboxesConnecting SmartleadReady, warmingNew mailboxes360 in this orderMailboxProviderSequencerStatusjordan.lee@acmereach.exampleGoogle WorkspaceSmartleadConnectingWarming, day 1 of 21riley.park@acmereach.exampleGoogle WorkspaceSmartleadConnectingWarming, day 1 of 21jordan.lee@acmeloop.exampleMicrosoft 365SmartleadConnectingWarming, day 1 of 21alex.chen@acmeloop.exampleMicrosoft 365SmartleadConnectingWarming, day 1 of 21riley.park@acmenorth.exampleAzure tenantSmartleadConnectingWarming, day 1 of 21alex.chen@acmepeak.exampleCustom SMTPSmartleadConnectingWarming, day 1 of 21go.quicklink.exampleListed at 10:12Emails stopped812Mailboxes214Campaigns3CAMPAIGNS USING THIS LINKQ4 hiring, foundersSmartlead412 stoppedOps leaders, EUInstantly268 stoppedAgency owners, USEmailBison132 stoppedNone of the 812 reached an inbox.Export campaignsCopy linkBuy domainsRegistered for you and set up for sending.DomainsOne per line or comma separatedPaste the domains you wantacmereach.example, acmeflow.example,acmedesk.example, acmegrid.example,acmeloop.example, acmenorth.example, acmepeak.example120 domainsSet up on every domainSPFDKIMDMARCMXOn premium DNSReady for mailboxes once set upBuy 120 domainsBuy mailboxes on 120 domainsacmereach.example and 119 more, ready for mailboxesProvidersSplit evenly by domainGoogle Workspace$2.50 per mailboxMicrosoft 365$2.50 per mailboxAzure tenants$30 per tenantCustom SMTPPriced for your setup120 domains360 mailboxes60 domains180 mailboxes60 domains180 mailboxes40 domains120 mailboxes40 domains120 mailboxes40 domains120 mailboxes30 domains90 mailboxes30 domains90 mailboxes30 domains90 mailboxes30 domains90 mailboxesMailboxes per domain12345People on the mailboxesOne mailbox each, on every domainJordan Lee, Riley Park, Alex ChenUsernamefirstfirst.lastf.lastfirstfirst.lastf.lastAdd photosJLJordan Leejordan@acmereach.examplejordan.lee@acmereach.example+119 domainsRPRiley Parkriley@acmereach.exampleriley.park@acmereach.example+119 domainsACAlex Chenalex@acmereach.examplealex.chen@acmereach.example+119 domainsSend toSmartleadInstantlyNone120 domains, 360 mailboxesWarmup starts as soon as they are ready.Buy 360 mailboxes⌘VPaste
Buy domains with every record in place

Paste the domains you want. Arcinbox registers them and publishes SPF, DKIM, DMARC and MX on each one.

See how

SEND FROM ANY OF THEM. WE WATCH ALL OF THEM.

HOW A GOOD CAMPAIGN GOES QUIET

Replies dried up in week three.
Nobody can tell you why.

Monday

An old list goes out.

Plenty of the people on it changed jobs since. Every bounce counts against the mailbox that sent it, and nothing stopped them going out.

Wednesday

Your tracking link gets listed.

Every email carrying it now looks like spam, including the ones already queued for tomorrow.

Friday

Google suspends two mailboxes.

Nobody tells you. You find out next week from a sequencer error, after days of sends that went nowhere.

And every dashboard you have still says healthy.

WHAT YOU TRY NEXT

So you start guessing.

  • Rewrite the copy
  • Cut daily volume
  • Buy fresh domains
  • Switch providers

Each guess costs a week. None of them looks at the email that did the damage, because by the time replies dry up, that email went out weeks ago.

The damage happens when you send.
That's where Arcinbox checks.

ARCWATCH

One product that watches, checks and heals every mailbox

Each problem arrives once, with what ArcWatch already did about it.

ARCWATCH · WATCH

Know what broke
while it still matters

ArcWatch names each problem before it costs you a month of sends.

Spot a suspension within the hour

When Google suspends a mailbox, you see it on your screen, not in a sequencer error next week.

Keep every DNS record passing

ArcWatch checks SPF, DKIM and DMARC again after setup, so a broken record never sits unnoticed.

About premium DNS

Catch a blocklist listing the same day

If a sending domain or a link you use lands on a blocklist, you see which one and what to do next.

How ArcWatch works

Stop the damage before the email leaves

ArcWatch stops emails to dead addresses and emails with a listed link. Everything else goes out as normal.

Book a deliverability audit
sam@getacme.example is sendingChecking
Won't bounceDead addresses stopped
Clean linksListed links stopped
sam@getacme.exampleOutgoing email
Tojo@northwind.exampleSent
Toana@oldlist.exampleStopped, would bounce
Linkgo.getacme.example/demoStopped, listed link
Toli@contoso.exampleSent
Checked before sending2 of 4 stopped
ExplainedWhy each one stopped
DeliveredThe rest goes out as normal

A stop, not a report

A report tells you what hurt you last week. The check stops it from leaving today.

Nothing to change

Your copy and your schedule stay as they are. The check runs on every email by itself.

A reason for every stop

Each stopped email comes back with why, so you clean the list instead of guessing.

Pause a mailbox before it burns

When a mailbox starts to go wrong, ArcWatch pauses it and holds its email.

Book a deliverability audit
getacme.exampleGoogle mailboxes
12 mailboxesAll sending
tryacme.exampleGoogle mailboxes
12 mailboxes1 paused

maya@tryacme.example paused at 10:40. Bounces from its last list ran high.

46 emails waitingResumes on its ownDomain unaffected
meetacme.exampleMicrosoft mailboxes
3 mailboxes1 replaced

No lost email

Email from a paused mailbox waits and goes out after the pause.

Back on its own

Nobody files a ticket. The pause lifts as soon as the mailbox recovers.

Every pause on one line

You see which mailbox paused, when, and why.

A burnt mailbox is our problem.
If one gets suspended anyway, we replace it at no charge.

$0to replace a
burnt mailbox

Keep the sequencer
you already run

Mailboxes sync straight into Smartlead and Instantly, and connect to any other sequencer over SMTP and IMAP.

  • Instantly
  • Smartlead
  • EmailBison
  • PlusVibe
  • lemlist
  • Saleshandy
  • Woodpecker
  • Apollo.io
  • Salesforge
  • Snov.io
WHO IT'S FOR

For teams that send
cold email every day

Agencies, sales teams and founders who can't afford a quiet month.

Agencies

One client's bad list stays that client's problem. Each client gets a separate workspace and their own domains.

Sales teams

Reps never touch DNS. You see every rep's mailboxes on one screen.

Founders

You are the outbound team. Arcinbox is the deliverability hire you skipped.

Operations

Hundreds of domains, and one list of what needs you today.

Growing teams

Add Microsoft next to Google without redoing any setup.

Start sending in three steps

Moving a large fleet? Talk to us before you order.

01

Buy mailboxes

Pick Google, Microsoft, Azure or custom SMTP, and the domains you want to send from.

02

Connect your sequencer

Choose your tool, and the mailboxes arrive in it.

03

Send as usual

Run campaigns the way you do today. ArcWatch tells you when something needs you.

One price per mailbox

Pay for the mailbox.
Deliverability comes with it.

Every check on this page is included, with no plans to pick. Warmup is $3 per mailbox per month, on a dedicated network.

Google WorkspaceStart here
$2.50/ mailbox / mo

Real Google Workspace users on Business Starter.

Coming soon
  • Every email checked before it sends
  • Free replacement for burnt mailboxes
  • Premium DNS on every domain
Microsoft 365
$2.50/ mailbox / mo

Email leads on Outlook from Microsoft mailboxes.

Coming soon
  • Every email checked before it sends
  • Free replacement for burnt mailboxes
  • Premium DNS on every domain
Azure tenants
$30/ tenant / mo

One tenant per client or brand.

Coming soon
  • Its own accounts and settings
  • Blocklist and DNS monitoring
  • Premium DNS on every domain
Custom SMTP
Custompriced for your setup

Sized with you around your volume and IPs.

Plan a setup
  • Planned with you on one call
  • Blocklist and DNS monitoring
  • Premium DNS on every domain

Google and Microsoft are priced per mailbox. Azure is priced per tenant, with capacity and licensing confirmed at checkout.

Questions

What people ask
before they switch

Short answers to the questions we hear most.

Is Arcinbox a sequencer?

No. Your sequencer still writes and schedules every campaign. Arcinbox supplies the mailboxes it sends from and looks after their deliverability.

Will my email still come from Google or Microsoft?

Yes. Recipients get a normal email from your provider, signed as you. Nothing about it changes for the person reading it.

Do you read my emails?

No. Nobody at Arcinbox reads your campaigns. The check looks for problems, not at what you wrote.

How soon can I start sending?

Google mailboxes are ready in under 10 minutes. If you add warmup, they are ready for campaigns on day 21.

Can I use domains I already own?

Yes. Bring your own domains, and Arcinbox sets them up for sending the same way as the ones you buy.

Stop guessing why
replies dropped

We will look at every domain and mailbox you send from
and show you what to fix first.

Book a deliverability audit
Deliverability audit

Find out what is costing you replies.

Thirty minutes on a call. We go through your domains, mailboxes and sending with you, and name what is putting your replies at risk.

For senders on Google, Microsoft, Azure and custom SMTP

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