Send transactional email through your own domain.
Reliably, simply, and without the complexity. Astrokit Relay handles deliverability, bounce management, and domain authentication, while you keep full ownership of your sending identity and reputation.
3-month full-access trial · Add-ons only when you need them
curl -X POST https://relay.astrokit.app/api/v1/mail/send \
-H "Authorization: Bearer org_xxxxxxxx_xxxx" \
-H "Content-Type: application/json" \
-d '{
"from": "[email protected]",
"sender_name": "Your Company",
"to": ["[email protected]", "[email protected]"],
"cc": ["[email protected]"],
"reply_to": "[email protected]",
"subject": "Monthly Report",
"html": "<h1>Monthly Report</h1><p>Please find your report attached.</p>",
"text": "Monthly Report\n\nPlease find your report attached."
}'<?php
$ch = curl_init('https://relay.astrokit.app/api/v1/mail/send');
curl_setopt_array($ch, [
CURLOPT_POST => true,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_HTTPHEADER => [
'Authorization: Bearer org_xxxxxxxx_xxxx',
'Content-Type: application/json',
],
CURLOPT_POSTFIELDS => json_encode([
'from' => '[email protected]',
'sender_name' => 'Your Company',
'to' => ['[email protected]', '[email protected]'],
'cc' => ['[email protected]'],
'reply_to' => '[email protected]',
'subject' => 'Monthly Report',
'html' => '<h1>Monthly Report</h1><p>Please find your report attached.</p>',
'text' => "Monthly Report\n\nPlease find your report attached.",
]),
]);
$response = json_decode(curl_exec($ch), true);
curl_close($ch);const response = await fetch('https://relay.astrokit.app/api/v1/mail/send', {
method: 'POST',
headers: {
'Authorization': 'Bearer org_xxxxxxxx_xxxx',
'Content-Type': 'application/json',
},
body: JSON.stringify({
from: '[email protected]',
sender_name: 'Your Company',
to: ['[email protected]', '[email protected]'],
cc: ['[email protected]'],
reply_to: '[email protected]',
subject: 'Monthly Report',
html: '<h1>Monthly Report</h1><p>Please find your report attached.</p>',
text: 'Monthly Report\n\nPlease find your report attached.',
}),
});
const result = await response.json();From solo developers to agencies managing client email
SaaS products
Signup confirmations, billing alerts, password resets, system notifications.
Ecommerce stores
Order confirmations, shipping updates, customer emails.
Agencies
Managing transactional email for client websites.
Developers
A clean API alternative to Mailgun, SendGrid, or Postmark, with domain ownership at the centre.
How Relay fits your business
Astrokit Relay fits differently depending on your role. Here’s how it helps, whoever you are.
Developer
Relay drops into your stack with a clean REST API you can integrate in an afternoon, complete with docs and full delivery status tracking. When your current provider starts tripping spam filters, moving over is quick — not a migration project.
Marketing Manager
See exactly what’s been sent and delivered without needing to understand SMTP — the dashboard puts it all in plain language. Need to help a client fast? One-click resend gets a message back out immediately.
Server Admin
Every message is logged with accurate delivery timelines, so you always know where an email went. Multi-layer bounce protection and built-in data controls keep your sending reputation secure without constant watching.
Technical Lead
Roll out one reliable sending solution across every client site, instead of managing different providers and configs per project. Costs stay predictable as you scale.
Plans sized for what you send
Predictable monthly pricing based on how much email you send. No per-feature paywalls — every plan sends through your own domain.
Perfect for getting setup to send email from your applications.
- ✓ Relay Sends — 10,000/mo
- ✓ Relay Identities — 10
- ✓ Log Retention — 30 Days
- ✓ Templates
Perfect for getting setup to send email from your applications.
- ✓ Relay Sends — 50,000/mo
- ✓ Relay Identities — 50
- ✓ Log Retention — 60 Days
- ✓ Templates
- ✓ Click Tracking
- ✓ Recipient Verification — 500/mo
What’s excluded from every plan: all plans exclude consumable credits beyond the included allowance and select premium add-on modules — those are priced separately below, so pricing stays predictable with no hidden usage traps. Text messaging runs on its own separate plans under Astrokit SMS, rather than as a CRM add-on. *Paid plans include a monthly Relay sending allowance; overage is billed as a consumable.
- Sends via your own domain — not a shared sending pool.
- Clean, modern API with async queuing and real-time status tracking.
- Multi-layer bounce protection — circuit breaker, suppression list, and global blacklist.
- A full email log with a complete delivery timeline per message.
- Designed to integrate natively with Astrokit CRM — and shares one login via Astrokit Identity.
Works natively with Astrokit CRM
Send emails to contacts directly from CRM records, log every send as activity, and trigger follow-ups automatically when a deal changes stage.