Provider Rotation

Quota-aware sending across 6 email providers — quota providers first, pay-per-send as overflow

Provider Status
Test Send

Test sends verify that the provider API is working and the from-domain is authenticated. Use a real email address as the recipient.

Rotation Logic

Priority Order

  1. SendGrid — 50,000/month (highest quota)
  2. SMTP2GO — 10,000/month
  3. Postmark — 10,000/month
  4. Brevo — 5,000/month (reserve for high-rep sends)
  5. Mailgun — pay-per-send (overflow)
  6. Elastic Email — pay-per-send (final fallback)

Daily Budget Formula

dailyBudget = floor(remainingMonthlyQuota / daysLeftInCycle)

The system picks the highest-priority provider that still has daily budget remaining. If all quota providers are exhausted, Mailgun absorbs all overflow.

Automatic failover: if a provider returns an error, the next provider in priority order is tried immediately.