Batching API Requests for Email Recipients
Sending emails with multiple recipients? Learn how to bypass MailSlurp's limits with batching in our guide on sending API requests.
MailSlurp enforces limits on the number of recipients that can be sent per email sending request. The email sending options 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:
// 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.