Email infrastructure, run by us
Your email, on mail servers we actually run.
A sending API and an SMTP relay for transactional and marketing mail, plus real mailboxes on your own domain with a mail client that works. It runs on SendKnot's own servers and its own sending addresses - there is no third-party email provider between you and the recipient, and no reseller markup on top of one.
- $0.60
- per 1,000 transactional sends
- $2.50
- per mailbox, per month
- No tiers
- you pay for what you send
Sending
One API, or the SMTP port you already have code for.
Post JSON to the send endpoint, or point an existing application at the SMTP relay with credentials you generate yourself. Both paths bill at the same rate from the same wallet, so migrating an app is not a pricing decision.
- REST API with keys you create, scope and revoke in the Console
- SMTP relay on submission ports, for software that only speaks SMTP
- MJML templates with variable substitution, and weighted variants for splitting a send between two versions
- Webhooks for accepted, delivered, bounced and complained events
- A suppression list that is checked before a message leaves, and that you can inspect and edit
Deliverability
Authentication set up properly, and IPs that get warmed.
Add a domain and the Console gives you the exact DNS records to publish, then checks them itself rather than taking your word for it. Sending stays off for that domain until they verify - which is a smaller inconvenience than discovering the problem from a recipient.
- SPF, DKIM and DMARC records generated per domain, with a verification check that must pass
- DKIM signed with the selector actually published in your DNS - verified by a script that compares the two
- Dedicated sending addresses with a managed warm-up schedule, so volume ramps instead of arriving all at once
- Bounces and complaints read from the receiving servers' own SMTP replies, not inferred
- Automatic throttling and suspension when a complaint rate crosses a threshold, before a mailbox provider does it for you
Mailboxes
Real mailboxes on your domain, not forwarding.
you@yourcompany.com with its own password, its own storage and its own two-factor authenticator - a mailbox, not an alias pointed somewhere else. Open it in the browser, or connect Apple Mail, Thunderbird or your phone over IMAP and JMAP.
- 10 GB per mailbox, on your own verified domain
- IMAP and JMAP, so any mail client works - including the one already on your phone
- A web mail client at mail.sendknot.com: threads, search, attachments, scheduled send, offline drafts
- Inbound filtering with quarantine, and an allowlist and blocklist you control
- Mail between your own team, and ordinary correspondence, is covered by the seat and never billed as a send
Control
You can see what happened, and who did it.
The Console shows the delivery record for every message, the state of every domain and IP, and the wallet balance with what it buys at your current rate. Access is per-person with roles, and every account can be locked down properly.
- Per-message delivery, bounce and complaint records, with the remote server's own response
- Team members with roles, so a colleague can have a mailbox and no billing access
- Two-factor authentication by authenticator app, and passkeys for sign-in without a password
- One sign-in for the Console and one place a SendKnot password is ever typed
- A wallet you top up, with an optional automatic top-up that is off unless you turn it on
Plainly
What SendKnot does not do.
Some of this is a deliberate product decision and some of it is simply not built yet. Both are worth knowing before you choose a provider, so they are on the front page rather than discovered later.
- No open tracking and no click tracking. There is no engagement data, because nothing here inserts a tracking pixel or rewrites your links. If your reporting depends on open rates, this is the wrong product.
- No drag-and-drop campaign designer. Marketing sends use the same API and the same templates as everything else.
- No free tier and no trial. Sending stays off until billing is set and a domain is verified; the smallest top-up is $5.
- No AI features, of any kind, anywhere in the product.
- Single sign-on between the Console and Mail is not finished. Both use one SendKnot account, and Mail still asks for its own sign-in.
Set up a domain, send a test, see what arrives.
Creating an account is free and sends nothing. You will need to verify a domain and add credit before the first message leaves, which is the same order of operations any serious mail provider should insist on.