How it works
Nestiel does not connect to SMTP or IMAP. All email send/receive and delivery events go through the Resend HTTP API; metadata lives in your own Postgres, attachments in your object storage.
The data flow in four steps
Your domain + Resend
Verify your sending domain in Resend and configure one org-level API key shared by every inbox.
Send & receive over HTTP
Sending, receiving, and delivery events all go through the Resend REST API; SMTP is only used to send login codes.
Your data, your database
Email metadata, conversations, and org data live in your own Postgres; attachment binaries live in your object storage.
Automatic threading
Outbound mail embeds a plus-tag and References so replies are woven back into the right conversation.
FAQ
Do I need my own domain?
Yes. Nestiel is built for teams that already have their own domain connected to Resend, sending from addresses like hello@yourdomain.com.
Does it connect to SMTP or IMAP directly?
No. All sending, receiving, and delivery events go through the Resend HTTP API. SMTP is used only to deliver login one-time codes.
Where is my email data stored?
Email metadata, conversations, and org data live in your own Postgres; attachment binaries live in the object storage you configure — the data is yours to own and operate.
Can multiple members share one inbox?
Yes. Attach mailboxes like support@ or sales@ to an org and the whole team can work them, with admin / member roles separating permissions.
What is separate sending?
When sending one message to many recipients, Nestiel delivers each their own standalone email on a tunable 1–10 minute cadence, with pause and resume from the send-task panel — protecting deliverability.
How do I enable AI email capabilities?
Translation, AI drafting, and per-recipient personalization are all live. An admin drops an OpenAI-compatible model (API key, base URL, model name) into the org settings; every member in the org then shares the same key.
Can scheduled send and bulk sending be combined?
Yes. On the compose page, enable both 'separate sending' and 'scheduled send'; when the time arrives, the system materializes the message into a send task and delivers it row by row on the tunable cadence, with pause and resume from the send-task panel.
Start your team's email workflow
Connect your own domain and Resend account to begin. Data stays with you; capabilities scale with your org.