SMTP relay.
Connect the software you already use to Bird’s email delivery. Keep your application’s SMTP integration, send over an encrypted connection, and track results in the dashboard or through MCP.
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Check the setup.
Then connect your app.
Start with your sending identity. Ask Bird MCP to check the domain and its DNS records, then connect your application to the regional SMTP relay with an email-enabled API key.
List my email sending domains and inspect the domain I will use for SMTP. Show the verification status and any DNS records I still need to configure. Do not modify DNS or send email.
Check my sending domain
before I connect SMTP.
email_Founddomains_ list email_Checkeddomains_ get
mail.harbor.example
Change the connection.
Keep the message.
Add Bird’s host, port and credentials to your mail library or application. Keep your HTML and attachments. Set category, tracking and IP-pool defaults on the API key so each application sends with its own configuration.
Use implicit TLS on port 465 or STARTTLS on 587 or 2525. Match the SMTP region to your API key.
Ready to build?
Your app sends it.
Bird shows you what happened.
SMTP messages appear in the same email log and reports as API sends. Keep the message ID from the queued response, then follow delivery, deferrals and bounces in Bird or through signed webhooks.
Your domain.
Your reputation.
Verify your sending identity. Manage reputation as your volume grows.
SMTP relay, explained.
What credentials does Bird SMTP use?
Use bird as the username and a regional API key with emails permission as the password. Connect to eu1.smtp.bird.com or us1.smtp.bird.com to match the key region.
Which ports are supported?
Use 465 for implicit TLS or 587 and 2525 for STARTTLS. Authentication requires encryption. Port 25 is not offered for submission.
Can SMTP render a stored Bird template?
SMTP takes content from the MIME message your application submits. Use the Email API when you want to send a stored template with structured parameters.
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Go further.
With Email.
Everything from your first send to delivery at scale.
Transactional email
Send receipts, confirmations and notifications.
Email marketing
Create broadcasts, newsletters and promotions.
Email API
Build email into your app or agent.
Email automation
Connect customer events to relevant messages.
Email templates
Create reusable, personalized emails.
Contacts & audiences
Organize contacts and maintain audiences.
SMTP relay
Connect your existing mail stack.
Inbound email
Receive replies and attachments.
Email deliverability
Authenticate senders and manage reputation.
Email analytics
Trace delivery, engagement and failures.
Inbox Insights
Measure inbox placement and run seed tests.
Competitive Insights
Explore competitor campaigns and sending patterns.
Start with one. Build across channels.
Bring your next customer conversation into the same workspace.
Send, receive, and track email.
SMS
Send updates. Keep replies connected.
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Help customers in Messages.
Voice
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Verify
Confirm access with a code.
Lookup
Check contact details before sending.
Mailbox
Give your application an inbox.
eSIM
Build mobile connectivity into your product.
Realtime
Keep your applications in sync.