SMTP Relay
SMTP that just works
Already sending email via SMTP? Point your existing application at Mail Tactic’s relay and benefit from our infrastructure immediately — no SDK, no API migration, no code changes.
Configuration
| Setting | Value |
|---|---|
| Host | smtp.mailtactic.com |
| Port | 587 (STARTTLS) or 465 (SSL) |
| Username | Your API key |
| Password | Your API key |
| Encryption | STARTTLS or SSL/TLS |
Works with everything
SMTP is universal. Whether you’re running a legacy PHP app, a Django site, a Rails service, or configuring a no-code tool — if it can send email, it works with Mail Tactic.
Full observability, no extra work
Every email sent through SMTP is tracked just like the REST API. Delivery status, bounces, opens, and clicks all appear in your dashboard the moment they happen.
Volume and performance
Our SMTP relay is backed by the same multi-region edge infrastructure as our API. High-throughput senders can use connection pooling across multiple relay endpoints to maximize throughput.
- Connection reuse — keep-alive connections reduce latency per message
- Multiple endpoints — distribute load across regional relay clusters
- Automatic retry — transient failures are retried transparently
Authentication and security
SMTP auth uses your API key as both username and password. Connections are TLS-only. Plain-text SMTP is not supported.
What’s next
- API Reference — send via REST if you need programmatic control
- Getting started — configure SMTP in minutes