Sending Emails

Learn how to compose, send, and manage emails using Airsend — both through the web interface and via the API.

Requirements

Before you can send emails, ensure the following are in place:

Verified account
Your email address must be verified
Added domain
At least one custom domain added to your workspace
Verified domain
All required DNS records (MX, SPF, DKIM) must be configured and verified
Active subscription
An active plan on your workspace (free tier has limited sending)

Compose & Send

You can compose and send emails through the Airsend web interface or programmatically via the API.

Using the Web Interface

Click the Compose button in your inbox
Select the From address (choose which domain/alias to send from)
Enter the recipient's email address in the To field
Add CC or BCC recipients if needed
Enter a subject line
Compose your email using the rich text editor or switch to HTML mode
Attach files if needed (see Attachments section)
Click Send

Using the API

Send emails programmatically using the POST /client/send endpoint.

POST /client/send
Headers:
  client_key: YOUR_API_KEY
  client_secret: YOUR_API_SECRET
  Content-Type: application/json

Body:
{
  "from": "[email protected]",
  "to": "[email protected]",
  "subject": "Hello from Airsend",
  "html": "<p>This is a test email sent via the Airsend API.</p>"
}

Required Fields

Field	Type	Description
`from`	string	Sender email address (must be a verified domain)
`to`	string	Recipient email address
`subject`	string	Email subject line
`html`	string	HTML body of the email

Attachments

You can attach files to your emails through both the web interface and the API.

Attachment Limits

Limit	Value
Maximum file size	25 MB per attachment
Maximum total size	25 MB per email (all attachments combined)
Maximum attachments	10 files per email

Large Files

For files larger than 25 MB, consider using a file sharing service and including a download link in your email instead.

Email Templates

Save time with reusable email templates. Create templates for common emails like welcome messages, notifications, or newsletters.

Creating a Template

Go to Settings → Email Templates
Click New Template
Enter a template name and subject line
Design your email using the visual editor or HTML
Use variables like {{name}} for personalization
Save the template

Available Variables

Variable	Description
`{{name}}`	Recipient's name
`{{email}}`	Recipient's email address
`{{date}}`	Current date
`{{unsubscribe_url}}`	One-click unsubscribe link