DELIVERABILITY
Emails that go out at a pace inboxes trust
Blast your whole list at once and Gmail and Outlook notice. Six and Two paces every campaign to what each inbox provider will accept right now, spread across your sending domains, so your mail lands in the inbox instead of spam.
A separate pace for every inbox provider
No catch-up bursts, ever
99.7% of mail delivered across our network

THE PROBLEM
Send too fast and the inbox closes the door

You hit send on a big campaign, and for a moment everything looks fine. Then the numbers come in: half your list never saw the email, and the ones that did found it in their spam folder instead of their inbox. Gmail and Outlook watch for a mailbox that suddenly sends thousands of messages in one go, and they treat it the way they'd treat any unfamiliar, unproven sender: with suspicion.
A domain earns its reputation the way a person earns trust: gradually, through consistent behavior. A new sending domain starts small, and inbox providers watch how it's received before they let more volume through. Send too much too soon and you don't just lose that one campaign; a single bad afternoon can keep a domain out of the inbox for weeks while it rebuilds the trust it just spent.
That's not something you should have to manage by hand. Six and Two paces every send to match what each inbox provider will accept right now, and spreads the load across your sending domains, so no single domain ever carries more than its reputation can support.
HOW IT WORKS
A campaign that paces itself
You write and launch a campaign the same way every time. What happens next is handled for you, provider by provider.
You launch the campaign
You design and schedule a send the way you always do. There's nothing to configure for pacing; it runs on its own.
It's split across your sending domains
The campaign spreads across your sending domains, and every recipient's message stays fully aligned to the one domain that carries it.
Each provider gets its own rate
Gmail, Microsoft, Yahoo and the rest each receive mail at a pace adjusted to how that provider is responding right now.
A slow-down means a delay, not a burst
If a provider asks for less volume, the campaign simply takes a little longer. There's no catching up later.
The campaign finishes, fully delivered
Every message goes out, and your domain's reputation is exactly where it was before you sent, or better.
IN DETAIL
The mechanics behind a steady send
Three things happen under the hood of every campaign you send, none of which you have to think about.
PACE BY PROVIDER
A different pace for Gmail, Outlook and everyone else
Gmail doesn't behave like Microsoft, and Microsoft doesn't behave like Yahoo. Each one sets its own tolerance for how much mail it will accept from a sender, and that tolerance shifts depending on how your recent mail has been received.
Six and Two tracks each provider separately and adjusts your sending rate to match, in real time. You don't pick a speed or set a limit; the pace follows what's actually working with each inbox right now.
Separate rate per inbox provider
Adjusted from how each provider is responding now
No setting for you to tune

NO BURSTS
Asked to slow down, we slow down
When a provider signals that it wants less mail from you, some systems hold everything back and then fire it all off at once as soon as the restriction lifts. That burst looks exactly like the behavior that got flagged in the first place.
Six and Two never does that. If a provider asks for a slower rate, your campaign takes a little longer to finish. There's no stockpile, no catch-up spike, and no second flag on your domain for the same send.
A slower rate means a longer send, not a queue
No stockpiling, no catch-up spike
Unaffected providers keep sending normally
SPREAD ACROSS DOMAINS
Every message aligned to the one domain that sent it
A single campaign doesn't ride on a single domain. It's spread across your sending domains, so no one domain ever carries the full weight of a large send by itself.
For each recipient, the From address, the signature, the tracking links and the landing page all belong to the exact same domain. Nothing is split or mismatched between the message and where it points, which is part of what keeps a domain looking trustworthy to the providers reading it.
A campaign spans several of your sending domains
From address, links and landing page all match
No single domain carries the whole send

WHAT IT MEANS FOR YOU
Steadier sending, better inbox placement
None of this changes how you send. It changes what happens to your mail after you do.
Inbox placement you can count on
Across our network, 99.7% of mail is delivered. That's the result of pacing every campaign to what inbox providers will accept, rather than pushing a whole list out at once and hoping for the best.
Your reputation protected without a thing to configure
New domains build their reputation gradually and earn more volume as providers accept their mail. You never set a schedule or watch a dial.
No catch-up bursts, ever
If a provider asks for less volume, your campaign takes a little longer instead of spiking. A longer finish time is a small price for a trusted domain.
Every provider treated on its own terms
Gmail, Microsoft, Yahoo and the rest each get a sending rate matched to how they're responding right now, not a single blanket speed for everyone.
Campaigns that finish fully, not partially
Spread across your sending domains, with each message aligned to the domain that carries it, your send completes with every recipient reached.
COMPARED
What a paced send looks like next to a blasted one
Most platforms let you send as fast as you want. That speed is the problem, not the feature.
A typical email platform
- Blasts the whole list at once. Looks like spam to Gmail and Outlook.
- One sending rate for everyone.
- Catches up with a burst after a slowdown.
- One domain carries the whole campaign.
- New domains sent at full volume immediately.
Six and Two
- Paces every send. Matches the rate each provider accepts right now.
- A separate pace for every inbox provider, adjusted as it responds.
- No catch-up bursts, ever. The campaign just takes a little longer.
- Spread across your sending domains, each message aligned to the one that sent it.
- New domains build reputation gradually, earning more volume as providers accept their mail.
QUESTIONS
Questions about deliverability

Why does my campaign take a while to finish?
Because it's paced to what each inbox provider will accept. A campaign that finishes a little later keeps your domains trusted, which is what gets the next one into the inbox.
What does 99.7% delivered mean?
Across our whole network, 99.7% of the mail sent is accepted by the receiving mail servers. It's a network-wide figure, not a guarantee for any one send.
Will slowing down hurt my results?
A slower finish protects the thing that actually drives results: your domain landing in the inbox at all. A fast send that lands in spam helps nobody.
Can I speed up sending myself?
There's no setting to override the pace. It follows what each provider is accepting right now, which is exactly what keeps your domain in good standing with that provider.
What happens if a provider asks the platform to slow down?
The campaign takes a little longer instead of spiking. There's no catch-up burst once the restriction lifts, which is what would raise a flag in the first place.
Do I need to set up my own sending domains for this to work?
No. Your sending domain is registered, authenticated and hosted for you. Pacing and spreading sends across your domains happens automatically from there.
Does pacing change how my emails look or what they say?
No. Pacing only affects the speed and spread of the send. Your design, copy and offer go out exactly as you built them.
Is this feature on every plan?
Yes. Every feature is on every plan, including this one, from the smallest plan to the largest.
WORKS WITH
The rest of what keeps you out of spam
Pacing is one part of getting into the inbox. These do the rest.
Sending domains, handled
Your domain is registered, authenticated and hosted for you. Zero DNS records to touch.
See sending domainsEvery address checked
Dead mailboxes and complained addresses never enter a campaign in the first place.
See email verificationPre-send review
A specialist check of links, headers and footer before launch, while fixes are still free.
See pre-send reviewHonest reporting
Delivered, bounced and complained, reported live, alongside real human opens.
See reporting
Send at a pace that keeps you in the inbox
Every feature, every plan, month to month, with your sending domain set up and your pace handled for you.
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