March 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 SMTP credential as the username and 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, password)
- 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.