MailSlurp enforces limits on the number of recipients that can be sent per email sending request. The [email sending options](/guides/sending-email/) permit maximum 10 `to`, `cc` or `bcc` recipients per field. This means if you wish to send to more than 10 recipients per field you should batch your API requests:

## How to split requests

Batch your recipient requests by splitting an array of recipients into chunks:



```typescript
// MailSlurp limit `to`, `bcc` and `cc` recipient fields to maximum 10 recipients
// so to send emails to more than 10 recipients batch your api requests
const chunkSize = 10;
for (let i = 0; i < recipients.length; i += chunkSize) {
  const recipientGroup: string[] = recipients.slice(i, i + chunkSize);
  // add a pause to avoid rate limits
  await new Promise((r) => setTimeout(r, 100));
  // send email to chunk of recipients
  await mailslurp.inboxController.sendEmailAndConfirm({
    inboxId: inbox.id,
    sendEmailOptions: {
      to: recipientGroup,
      subject,
    },
  });
}
```



> Remember to include a time pause in your request loop to avoid rate limiting.