Email, without the headache.

Sendpository is an email API for developers to send and receive email. You verify a domain you own using DNS records, create an API key, and send email with a single HTTPS POST request; mail sent to your domain can be received through the same API. It handles 2048-bit DKIM signing, delivery logs, signed webhooks, and bounce and complaint suppression.

Yes. Marketing and transactional email share one plan and one monthly quota on Sendpository - there is no separate marketing product to buy and no second bill. Most email providers charge for these separately.

Send a POST request to https://api.sendpository.com/v1/emails with your API key in an Authorization: Bearer header, and a JSON body containing from, to, subject and either html or text. The response returns the message id. There is a Node.js and TypeScript SDK (npm install sendpository), and every other language can call the REST API directly since it is plain JSON over HTTPS.

There is a permanent free plan - not a trial - and monthly paid plans with higher volume and no daily limit. Current limits and prices are always on sendpository.com/pricing, read live from the plan settings. Paid plans never charge overage: sending stops at the quota instead.

Yes. Add an address or a catch-all on a verified domain and every message is delivered to your dashboard inbox, the inbound API and an email.received webhook. Each message is spam-scored and carries a sender verdict - verified, failed, unverified or unchecked - from SPF, DKIM and DMARC, so automations can refuse forged senders.

Yes. Every successful payment produces a GST-compliant tax invoice with CGST, SGST or IGST applied according to your place of supply, a gapless invoice number, and the SAC code for online information services. Invoices are emailed automatically and available in your billing history.

Three are required: an SPF TXT record and a bounce MX record on an sp. subdomain, plus a DKIM TXT record on your apex. A DMARC record is recommended but optional. Everything except DKIM sits on the sp. subdomain, so the SPF record you already publish for Google Workspace or Microsoft 365 is left untouched and nothing has to be merged by hand.

Yes. Sendpository covers the same ground as Resend, SendGrid, Postmark and Mailgun - a REST API for transactional email with domain verification, delivery logs and webhooks - and adds receiving email on your own domain with SPF, DKIM and DMARC verdicts on every message, plus a permanent free plan you can launch on. Detailed comparisons are at sendpository.com/alternatives.

Sendpository re-checks every verified domain daily. If the required records stop resolving they are flagged, and after 72 hours of continuous failure sending from that domain is suspended automatically. Restoring the records re-enables it at the next check without contacting support. Providers that verify once will keep signing mail for a domain long after its owner has lost control of it.

Sending stops and the API returns a quota_exceeded error until the next billing period begins. Nothing is sent beyond your plan, so there is never a surprise overage bill. You can upgrade at any time from Settings and the larger quota is available as soon as the pro-rated payment clears.

Hard bounces and spam complaints are recorded automatically and the address is added to your account's suppression list. Further sending to a suppressed address is refused, which protects both your sender reputation and everyone else's on the platform.

Yes. Every webhook carries a Sendpository-Signature header containing a timestamp and an HMAC-SHA256 of the payload. The timestamp is inside the signed content, which prevents replay attacks. An endpoint that fails 15 times consecutively is disabled automatically.

Yes. Include a scheduled_at field with an ISO 8601 timestamp in your send request and the message is held until then. A scheduled message can be cancelled any time before it is handed to the mail servers.

Sendpository is a managed service - you use the hosted API and do not run any mail infrastructure yourself. The platform runs on its own mail servers with dedicated sending IPs rather than reselling another provider's infrastructure.