The email API for your app
Connect your users’ mailboxes, Gmail and any IMAP provider, with one REST API. PigeonPost keeps them in sync, tells your app the moment mail arrives, and sends replies from the user’s own address.
Everything your app needs from email
Syncing mailboxes, keeping connections alive, threading replies and storing attachments takes months to get right. PigeonPost does it, and gives your app clean JSON and webhooks.
Gmail and Google Workspace with an app password, Yahoo, iCloud, AOL, Zoho, GMX, Fastmail, hosting companies and your own mail servers.
New mail, changes and account status reach your endpoint as signed events, retried until your server answers.
Send from the user’s own address. Replies carry the right headers, so the conversation stays together for everyone.
Files are copied to your storage in the background, so downloads stay fast even when the mail server is slow.
Bring in up to the last 30 days when a mailbox connects, without flooding your webhooks with old mail.
Know when a sent email is opened or a link is clicked, with the time, device and the link that was used.
Emails come with their thread, folder and role, and every mailbox has the list of people it has emailed with.
Add accounts, watch their status live, read synced mail, manage webhooks and API keys, and follow every delivery.
From inbox to your app
Four steps between your user’s mailbox and your product, and PigeonPost runs three of them for you.
Send the address and password with one API call, or add the mailbox in your dashboard.
PigeonPost keeps a live connection to the Inbox and checks the other folders every 30 seconds.
Your endpoint gets a signed email.new webhook with the full email, usually in under a second.
Send the answer from the user’s address, in the same thread, with one call.
Built for developers
Plain REST and JSON, an API key header, and the same shapes as Unipile’s v2 API, so ids, lists and events look familiar from the first request.
curl -X POST $PIGEONPOST_URL/api/v1/auth/intent \
-H "X-API-KEY: $PIGEONPOST_KEY" \
-d '{ "provider": "imap", "email": "support@acme.com",
"password": "app-password" }'{
"type": "email.new",
"account_id": "acc_3c9e4f1a7b2d…",
"data": { "email": {
"subject": "Order #1042 arrived damaged",
"from_attendee": { "identifier": "ana@customer.com" },
"thread_id": "c0a8f3…@customer.com",
"has_attachments": true
} }
}Measured in a 30-minute load test: 100 mailboxes, 1,000 emails an hour, API reads, sends and every webhook event delivered to a real public endpoint.
What teams build with PigeonPost
Turn a support mailbox into tickets: each new email opens one, replies join it, and agents answer from the support address.
Log every email with a contact, send from the rep’s own mailbox, and see when it was opened.
Read recent mail, draft answers for a person to approve, and send them in the right thread.
Keep candidate, supplier or booking emails, with their attachments, next to the record they belong to.
Answers before you build
The answers people ask first. The documentation covers the rest.
An email API for your app. Your users connect their mailboxes once; PigeonPost keeps them in sync, sends your app a webhook for every new email and change, and lets you send and reply from their own address.
Any mailbox with IMAP and SMTP: Gmail and Google Workspace (with an app password), Yahoo, iCloud, AOL, Zoho, GMX, Fastmail, hosting companies and your own mail servers. For well-known providers, only the address and password are needed.
PigeonPost keeps a live connection to each Inbox, so a new email usually reaches your webhook in under a second. Other folders are checked every 30 seconds, and you can ask for a sync at any time.
Yes. Turn on initial sync when connecting and PigeonPost imports the last 1 to 30 days. Imported mail does not send email.new webhooks; you get account.initial_sync events and read it through the API.
PigeonPost follows Unipile’s v2 API shapes: prefixed ids, lists with has_more, auth intents, webhook endpoints and v2 event names, so moving an integration over takes little work.
Every call is signed with HMAC-SHA256 using your endpoint’s secret, in the X-Email-Engine-Signature header. Calls that fail are retried with growing gaps, and every delivery is visible in your dashboard.
In your workspace’s own database, with attachments copied to your storage. Mailbox passwords are encrypted and never returned by the API or written to logs.
Pricing is per connected mailbox. Talk to us about your volume and we will set up your workspace.
Let the bird carry it
Connect the first mailbox in minutes. Your first webhook arrives right after.