When using hosting services, you'll encounter sending limits - restrictions on how many emails you can send from your account within a specific timeframe. These limits exist primarily for security and reputation protection. They prevent spam, maintain server stability, and ensure all users experience reliable email delivery.

Common types of limits include:

• Hourly/Daily Limits: Maximum emails per hour or day (e.g., 200/hour, 1000/day)
• Recipient Limits: Maximum recipients per email (often 50-100)
• Connection Limits: Simultaneous SMTP connections allowed

Exceeding these limits typically results in:

1. Temporary sending suspension
2. Emails being queued or rejected
3. Potential account review

For legitimate bulk emailing needs, consider:

• Using dedicated email marketing services (Mailchimp, SendGrid)
• Upgrading to hosting plans with higher limits
• Implementing email throttling to pace your sending

Always check your hosting provider's specific limits in their documentation or control panel to avoid service interruptions.