Email providers (BYO)

By default, Nitrosend sends your email through its managed infrastructure — no setup required. On paid plans you can instead bring your own provider (BYO): Nitrosend keeps handling composition, audiences, automation, tracking, and suppression, while your own provider account transports the mail.

Supported providers

Two ways to connect

Dashboard: go to Integrations, choose your provider, and enter the credentials. Nitrosend runs a connection test when you save a new integration, and you can re-run Test connection from the integration's page at any time.

MCP (agents): call nitro_configure_providers with operation: "configure". This stores the credentials — it does not test them. To test credentials against the provider, run Test connection in the dashboard or call POST /v1/my/integrations/{id}/test via the REST API.

{ "operation": "status" }

operation: "status" reports the stored configuration of the brand's active (primary) provider — plan gating, domain verification, and sending mode. It does not contact the provider, verify connection health, and it won't show a newly configured provider until that provider is set as primary.

Credentials are stored encrypted and are never returned in tool responses or API payloads.

Configured, connected, usable

• Configured — credentials are saved on the brand's active (primary) integration. Reported by operation: "status".
• Connected — the most recent connection test passed. Shown on the integration's page in the dashboard (and returned by the REST test endpoint).
• Usable — your plan permits BYO sending and nothing blocks it. Reported by operation: "status". It does not check domain verification or connection health.

Making it the active provider

Your first BYO integration automatically becomes the brand's active email provider. If you connect a second provider (or reconnect after switching), it does not take over automatically — open the integration's page and choose Set as primary to switch sending to it.

Sending domains under BYO

Each BYO provider issues its own DNS records for domain authentication. Add and verify your sending domain from Domains in the dashboard or with the nitro_manage_domains MCP tool — the records returned come from your provider.

Which provider?

If you don't have an existing provider relationship, you don't need one — Nitrosend's managed sending works out of the box with automatic warmup. BYO is for teams that already have reputation, volume pricing, or compliance requirements tied to an existing provider account.