Skip to main content
POST
/
api
/
v1
/
emails
/
{id}
/
reply
curl -X POST "https://api.jasni.ai/api/v1/emails/12345/[email protected]" \
  -H "Authorization: Bearer jsk_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "text": "Thanks for your email! I will review and get back to you.",
    "replyAll": false,
    "includeOriginal": true
  }'

{
  "success": true,
  "data": {
    "messageId": "<[email protected]>",
    "from": "[email protected]",
    "to": ["[email protected]"],
    "subject": "Re: Project Update",
    "inReplyTo": "<[email protected]>",
    "references": "<[email protected]>",
    "savedToSent": true
  }
}

​
Request

​
id
integer
required
UID of the email to reply to
​
account
string
required
Email account to send from
​
folder
string
default:"INBOX"
Folder where the original email is located

​
Body

​
text
string
Plain text reply body
​
html
string
HTML reply body
​
replyAll
boolean
default:"false"
Whether to reply to all recipients (Reply All)
​
includeOriginal
boolean
default:"true"
Whether to include the original message in the reply
At least one of text or html is required.

​
Response

​
success
boolean
Indicates if the reply was sent successfully
​
data
object
curl -X POST "https://api.jasni.ai/api/v1/emails/12345/[email protected]" \
  -H "Authorization: Bearer jsk_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "text": "Thanks for your email! I will review and get back to you.",
    "replyAll": false,
    "includeOriginal": true
  }'

{
  "success": true,
  "data": {
    "messageId": "<[email protected]>",
    "from": "[email protected]",
    "to": ["[email protected]"],
    "subject": "Re: Project Update",
    "inReplyTo": "<[email protected]>",
    "references": "<[email protected]>",
    "savedToSent": true
  }
}

​
How It Works

When you reply to an email, Jasni automatically:
  1. Determines recipients: Extracts the correct reply-to address from the original email
  2. Handles Reply All: When replyAll: true, includes all original recipients in To/CC
  3. Sets threading headers:
    • In-Reply-To: Points to the original email’s Message-ID
    • References: Full thread chain for email client threading
  4. Formats subject: Adds Re: prefix if not already present
  5. Quotes original: When includeOriginal: true, adds the original message with proper formatting
  6. Saves to Sent: Stores a copy in your Sent folder

​
Example with HTML

const response = await fetch(
  'https://api.jasni.ai/api/v1/emails/12345/[email protected]',
  {
    method: 'POST',
    headers: {
      'Authorization': 'Bearer jsk_your_api_key',
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      html: `
        <p>Thanks for your email!</p>
        <p>I'll review the proposal and get back to you by <strong>Friday</strong>.</p>
        <p>Best regards,<br>Your Name</p>
      `,
      replyAll: true,
      includeOriginal: true,
    }),
  }
);