> ## Documentation Index > Fetch the complete documentation index at: https://developers.sendlayer.com/llms.txt > Use this file to discover all available pages before exploring further. # Send Email > How to send emails using the SendLayer API ## Overview SendLayer makes it easy to send transactional and marketing emails via a simple API. This guide walks you through sending your first email using the SendLayer API, with examples for popular programming languages. ## Prerequisites * [Authorize your domain](https://sendlayer.com/docs/authorizing-your-domain/) * [Create or retrieve your API key](https://sendlayer.com/docs/managing-api-keys/) * [Install the SendLayer SDK](/quickstart/installation) ## Sending an Email After setting up your domain and API key, you can send emails using the SDK or directly via HTTP requests. ```javascript JavaScript theme={null} import { SendLayer } from 'sendlayer'; const sendlayer = new SendLayer('your-api-key'); const params = { from: 'sender@example.com', to: 'recipient@example.com', // or array of recipients subject: 'Test Email', text: 'This is a test email sent using SendLayer Node.js SDK', }; const response = await sendlayer.Emails.send(params); ``` ```python Python theme={null} from sendlayer import SendLayer sendlayer = SendLayer('your-api-key') params = { "sender": "sender@example.com", "to": "recipient@example.com", "subject": "Sending a Test Email", "text": "This is a test email sent using SendLayer's Python SDK" } response = sendlayer.Emails.send(**params) ``` ```php PHP theme={null} 'sender@example.com', 'to' => 'recipient@example.com', // or array of recipients 'subject' => 'Test Email', 'text' => "This is a test email sent using SendLayer's PHP SDK", ]; $response = $sendlayer->Emails->send($params); ``` ```ruby Ruby theme={null} require 'sendlayer' sendlayer = SendLayer::SendLayer.new('your-api-key') response = sendlayer.emails.send( from: 'sender@example.com', to: 'recipient@example.com', subject: 'Sending a Test Email', text: "This is a test email sent using SendLayer's Ruby SDK" ) ``` ```go Go theme={null} sl := sendlayer.New("your-api-key") resp, err := sl.Emails.Send(&sendlayer.SendEmailRequest{ From: "sender@example.com", To: "recipient@example.com", Subject: "Sending a Test Email", Text: "This is a test email sent using SendLayer's Go SDK", }) ``` ```bash cURL theme={null} curl --request POST \ --url https://console.sendlayer.com/api/v1/email \ --header 'Authorization: Bearer ' \ --header 'Content-Type: application/json' \ --data '{ "From": { "name": "Paulie Paloma", "email": "paulie@example.com" }, "To": [ { "name": "Pattie Paloma", "email": "pattie@exampledomain.com" } ], "Subject": "This is the email subject", "ContentType": "Text", "PlainContent": "This is a test email sent with the SendLayer API!" }' ``` Replace `` with your actual SendLayer API key in the request header. You can also send to [multiple recipients](/guides/send-email-to-multiple-recipients), add CC/BCC, and [attach files](/guides/send-email-with-attachments). SendLayer API also let's you send HTML emails. This can be useful if you'd like to use a template to send welcome emails to new users. To send HTML emails, simply update the `params` variable to include the `html` object. Then enter your HTML email as a string. ```javascript JavaScript theme={null} const params = { from: 'sender@example.com', to: 'recipient@example.com', // or array of recipients subject: 'Test Email', html: '

This is a test email sent with the SendLayer API!

', }; ``` ```python Python theme={null} params = { "sender": "sender@example.com", "to": "recipient@example.com", "subject": "Sending a Test Email", "html": "

This is a test email sent with the SendLayer API!

" } ``` ```php PHP theme={null} 'sender@example.com', 'to' => 'recipient@example.com', 'subject' => 'Test Email', 'html' => '

This is a test email sent with the SendLayer API!

', ]; ``` ```ruby Ruby theme={null} sendlayer = SendLayer::SendLayer.new('your-api-key') response = sendlayer.emails.send( from: 'sender@example.com', to: 'recipient@example.com', subject: 'Test Email', html: '

This is a test email sent with the SendLayer API!

' ) ``` ```go Go theme={null} sl := sendlayer.New("your-api-key") resp, err := sl.Emails.Send(&sendlayer.SendEmailRequest{ From: "sender@example.com", To: "recipient@example.com", Subject: "Test Email", Html: "

This is a test email sent with the SendLayer API!

", }) ``` ```bash cURL theme={null} --data '{ "From": { "name": "Paulie Paloma", "email": "paulie@example.com" }, "To": [ { "name": "Pattie Paloma", "email": "pattie@exampledomain.com" } ], "Subject": "This is the email subject", "ContentType": "HTML", "HTMLContent": "

This is a test email sent with the SendLayer API!

" }' ``` ## FAQ Authorizing your domain proves ownership and improves email deliverability by reducing the likelihood of your emails being marked as spam. You can create or retrieve your API key from your SendLayer dashboard under the **Settings ยป API Keys** section. Yes, you can provide an array of email addresses in the `to` field or see our [guide](/guides/send-email-to-multiple-recipients) for more details. See our [attachments guide](/guides/send-email-with-attachments) for instructions on sending emails with attachments. Check your domain authorization, verify your API key, and review the response from the API for any error messages. You can also consult the SendLayer dashboard for delivery status and logs.