PHP + SQLite SMTP Relay MVP
Queue tenant email and send it gradually with strict limits.
A practical SaaS starter for owned SMTP credentials, package limits, cron delivery, admin controls, and transparent sending history.
Default throttling
2,000 emails over a 20-hour window.
One email every 36 seconds unless a package overrides the daily quota.
Built for a production-ready MVP
Small enough to deploy quickly, structured enough to upgrade later.
Multi-tenant SMTP
Admin-managed encrypted SMTP credentials per user account.
Package limits
SaaS packages drive daily limits and scheduling intervals.
Cron worker
A minute-based worker processes due jobs and logs outcomes.
Pricing
Packages are loaded from the SQLite database.
Starter
$19.00/mo
For small teams validating SMTP relay workflows.
- Daily limit: 500
- Hourly guardrail: 50
Growth
$49.00/mo
Default production-ready package for steady sending.
- Daily limit: 2,000
- Hourly guardrail: 150
Scale
$99.00/mo
Higher-volume package for growing SaaS products.
- Daily limit: 10,000
- Hourly guardrail: 600