v0.2
March 1, 2025
SMTP Relay
Send emails through mailkube using your existing SMTP setup. No code changes required — update your host, port, and credentials and you're live.
SMTP Relay
What it does
mailkube SMTP Relay lets you route your transactional emails through mailkube’s infrastructure without changing a single line of application code. If your stack already sends via SMTP — whether it’s a legacy app, a framework mailer, or a third-party integration — you’re one config change away.
Point your SMTP host to smtp.mailkube.com, swap in your API key as the password, and your emails start flowing through mailkube’s delivery infrastructure immediately.
Key benefits
- Zero code changes — Drop-in replacement for any existing SMTP configuration. No SDK, no API integration required.
- Full observability — Every email sent via SMTP appears in your mailkube dashboard with the same delivery logs, bounce tracking, and open rate analytics as API sends.
- Deliverability infrastructure — Your SMTP traffic benefits from mailkube’s reputation management, SPF/DKIM signing, and multi-region routing.
- Instant migration — Move from your current provider in minutes, not days. Test with a single email before switching fully.
Getting started
- Go to your mailkube dashboard → Settings → SMTP
- Copy your SMTP credentials (host, port, username, API key)
- Update your application’s SMTP configuration
- Send a test email to verify delivery
Your existing email volume counts against your plan. See Pricing for limits.