Security

Email Sending Limits

Prevent users from maliciously spamming emails, with a free quota of 100 emails per day.

Introduction

To prevent abuse and ensure service stability, we have implemented email sending limits:

Daily Limits

  • Free tier: 100 emails per day
  • This limit helps prevent:
    • Email spam
    • Server overload
    • Service abuse

Implementation

The system tracks:

  • Number of emails sent per user
  • Daily reset of counters
  • Failed attempts

Rate Limiting

// Example rate limiting implementation
const DAILY_LIMIT = 100;
const RATE_WINDOW = 24 * 60 * 60 * 1000; // 24 hours in milliseconds

async function checkEmailLimit(userId: string): Promise<boolean> {
  const count = await getEmailCount(userId);
  return count < DAILY_LIMIT;
}

Error Handling

When limits are exceeded:

  • User receives clear error message
  • Suggestion to wait until next reset
  • Option to upgrade for higher limits

Monitoring

We monitor:

  • Overall email sending patterns
  • Abuse attempts
  • System performance

This helps maintain service quality and prevent misuse.


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