We solve deliverability before you press send. That is why 99.7% of mail is delivered.
Every input a receiving provider scores — the domain, its authentication, its warmup, the rate it sends at, the quality of the list, the handling of bounces and unsubscribes — is engineered into every send, for every client, automatically. You get a deliverability story you can tell with a straight face, and the screens to prove it.
By the time a deliverability dashboard moves, the damage is done.
Every mainstream platform gives you a deliverability report: bounce rate, complaint rate, sometimes a reputation score. What none of them say is that those numbers move after the fact. A domain that has bounced too hard or been complained about too often is slowed or blocked by receivers for days or weeks — and the report simply describes the aftermath.
The cause is structural. Public platforms send from shared infrastructure you cannot control, at rates you do not govern, to lists nobody verified, from domains set up by whoever had the DNS login that week. Deliverability in that model is something that happens to you.
SendTo owns every input receivers score — the domain, its authentication, its age and history, the rate, the list, the bounce and complaint handling — so it can engineer them, before the send, for every client, every time. Deliverability becomes a property of the system, and a thing you can sell.
What “engineered in” actually means.
Each is a feature in its own right. Together they are the reason the platform’s delivery rate is what it is.
Brand-matched managed domains
Every client sends from domains that read as their own brand — registered, authenticated and hosted by the platform. Aligned authentication on a brand-matched domain is the first thing a receiver checks.
Explore →Automatic warmup
A new domain starts small and grows only as receivers accept its mail. A domain that draws bounces is slowed. Nobody maintains a schedule; the platform does.
Explore →Multi-domain load balancing
Campaigns are spread across every domain a client has, so no single domain carries the volume — and every recipient’s From, links and landing page resolve to the same domain.
Explore →Governed pacing
Delivery rates are set separately for every receiving provider and never exceeded to catch up. The platform sends at the pace receivers accept, and no faster.
Explore →Mailbox-level verification
Every address is checked with the receiving server before it can enter a campaign. Hard bounces — the most damaging signal a sender can produce — are prevented rather than counted.
Explore →Suppression and unsubscribe hygiene
Anything that bounces or complains anywhere on the platform is suppressed everywhere. Unsubscribe links are signed and honoured in one click, so a recipient who wants out gets out instead of reporting spam.
Explore →Alignment: one brand, one domain, end to end
Receivers trust mail whose pieces agree with each other. The From address, the signature, the domain the links point to and the page the click lands on should all belong to one sender. On most platforms they do not: the From is the client, the links are the platform’s tracking domain, and the landing page is somewhere else again.
On SendTo, every recipient’s message is assembled so all four resolve to the same brand-matched domain — the one the balancer assigned to that recipient. Tracking links are served on it. The landing page is served on it. The signature is its own. That quiet alignment is why the platform’s mail is accepted the way it is.
- From, signature, links and page on one domain per recipient
- Tracking hostnames provisioned on every sending domain
- Landing pages served on the sending domain
Pacing: the speed receivers reward
A burst of mail from a domain is one of the most reliable ways to be throttled. SendTo’s dispatch engine is governed: every campaign leaves at rates set per receiver, per domain, and those rates are never exceeded to make up lost time. Most systems that pace will “catch up” after a missed window — and catching up is a burst by another name. The platform simply continues at the governed rate. The campaign might take longer. It arrives, and the domain stays trusted.
- Separate rate limits for every receiver
- No catch-up bursts, ever
- Live view of what is queued and flowing
Verification: prevent the bounce instead of counting it
A hard bounce tells a receiver you are sending to addresses you have not maintained. Enough of them and the domain’s reputation drops for everyone on the list. The cheapest deliverability improvement available to any sender is to never mail an address that does not exist — so SendTo checks every address with the receiving server first, and shows what it removed and why.
- Mailbox-level checks, never syntax checks
- Removal reasons written for the client
- Removed addresses kept as a record
Delivered is what we measure. The inbox is what a domain’s reputation earns — and every input to it is handled here.
Deliverability — engineered and measured
A message is delivered when the receiving server accepts it. That is a hard, observable event, and across the platform it happens 99.7% of the time. Verified addresses, warmed domains, governed pacing and clean authentication are what keep it there.
Inbox placement — earned, and earned faster here
Once accepted, each receiver decides where a message goes, using the reputation the sending domain has built with that receiver over time. A brand-new domain has no history yet, so its early mail is placed cautiously until engagement proves it is wanted. Warmup, engaged-first segments and verified lists build that history as fast as it can safely be built — which is exactly what the platform is for.
What a partner does with all this: nothing. That is the point.
You do not configure warmup. You do not choose a sending rate. You do not add a tracking domain or set up a landing-page host. You do not upload a list to a verification vendor and download it again. Every one of those steps exists on other platforms because the platform did not want to own the outcome. SendTo owns it.
What you do is create a client, import their list, build the campaign and launch. The platform decides which domain carries each message, how fast each receiver gets it, which addresses were safe to send to and what to suppress. Everything it decides is visible in the portal, and nothing it decides needs your intervention.
That leaves you free to sell the outcome. Here is your delivery rate, here are your human opens, and here is why the number is what it is.
Deliverability used to be something I explained. Now it is something I deliver — and I am paid every month for the result.
Deliverability questions
Why don’t you promise inbox placement?
Because nobody can, and you should be suspicious of anyone who does. Inbox placement is decided by each receiver using the reputation a domain earns with that receiver over time. What we promise is that every input those decisions are made from is engineered correctly — and that history builds as fast as it safely can.
Will a brand-new client’s mail go to spam at first?
Some of it can, until the new domain has history. That is exactly what warmup, verified lists and pacing are for. Partners who start with a client’s most engaged segment see the domain earn its reputation fastest.
Do you use shared IPs or shared domains?
Every client sends from their own brand-matched domains. The platform’s sending infrastructure is managed as a whole so no client’s behaviour is allowed to damage another’s.
What happens to a domain that starts bouncing?
It is slowed automatically, the addresses that bounced are suppressed platform-wide, and the balancer shifts the remaining volume to the client’s other domains. You see it in the domain’s status. You do not need to act.
How is 99.7% measured?
As the share of messages sent across the platform that receiving servers accepted. It is a live, platform-wide figure.
Sell the outcome, and show the screens that prove it.
Give every client the sending infrastructure a deliverability team would build — without the team.
No contract · Cancel any time · Explore everything before you pay