SendStack provides secure SMTP relay and REST API email delivery for modern applications.
Send emails via secure and reliable SMTP servers for high deliverability.
Send transactional emails programmatically using a developer-friendly API.
Track delivery, bounces, complaints, and get detailed email analytics.
Enable SPF, DKIM, and DMARC for verified domains to maximize deliverability.
Handle transactional email volume from startups to enterprises effortlessly.
Advanced routing and infrastructure ensure your emails land in the inbox.
Send verification emails to confirm new users securely.
Automatically deliver password reset emails with secure links.
Notify users of login activity to enhance account security.
Email order confirmations and receipts directly to your users.
Send critical system notifications and alerts programmatically.
POST /v1/send-email
{
"to": "user@example.com",
"from": "support@sendstack.us",
"subject": "Welcome to SendStack",
"html_body": "<h1>Hello User</h1><p>Thanks for signing up!</p>"
}Host: smtp.sendstack.us
Port: 587
Username: user@sendstack.us
Password: yourpassword
TLS: STARTTLS$0/month
$49/month
$199/month
SendStack is a modern cloud platform providing reliable transactional email infrastructure for developers and businesses. We help ensure your emails reach your users’ inboxes securely and efficiently.
We respect your privacy and do not share personal data with third parties. All data collected is used to provide the service.
By using SendStack, you agree to our terms. Service is provided "as is" without warranty.