Email Module

Query provides a simple yet powerful email sending module through the email module. This module allows you to send emails with attachments and inline files using either a custom SMTP server or Query’s default email service.

Basic Usage

import { email } from "query:email";

await email.send({
    from: "sender@example.com",
    to: "recipient@example.com",
    subject: "Hello from Query!",
    body: "This is a test email."
});

API Reference

email.send(options)

Sends an email with the specified options.

Parameters

options object with the following properties:

Property	Type	Required	Description
from	string	Yes	The sender’s email address
to	string \| string[]	Yes	Single recipient or array of recipients
subject	string	Yes	Email subject line
body	string	Yes	Email body content
replyTo	string	No	Reply-to email address
cc	string \| string[]	No	Carbon copy recipient(s)
bcc	string \| string[]	No	Blind carbon copy recipient(s)
attachment	Attachment[]	No	Array of file attachments
fileInline	FileInline[]	No	Array of inline files (e.g., embedded images)
smtpServer	string	No	Custom SMTP server hostname
smtpUsername	string	No	SMTP authentication username
smtpPassword	string	No	SMTP authentication password
smtpProtocol	“smtps” \| “smtp”	No	SMTP protocol (defaults to “smtps”)

Type Definitions

type EmailAddress = string;

interface Attachment {
    filename: string;      // Name of the attachment file
    content: Buffer;       // File content as Buffer
    contentType: string;   // MIME type of the file
}

interface FileInline {
    content: Buffer;       // File content as Buffer
    contentType: string;   // MIME type of the file
    contentId: string;     // Unique identifier for referencing in HTML
}

interface EmailResponse {
    code: number;         // Response code from the email server
    message: string;      // Response message from the server
}

Returns

Promise<EmailResponse> that resolves when the email is sent successfully.

Errors

Throws an Error if:

from field is missing
to field is missing or empty array
subject field is missing
body field is missing
SMTP configuration is invalid
Email fails to send
Attachment or inline file options are invalid

Examples

Basic Email

await email.send({
    from: "sender@example.com",
    to: "recipient@example.com",
    subject: "Simple Test",
    body: "This is a basic email test."
});

Email with Attachments

await email.send({
    from: "sender@example.com",
    to: "recipient@example.com",
    subject: "Email with Attachments",
    body: "Please find the attached files.",
    attachment: [
        {
            filename: "document.pdf",
            content: pdfContent,
            contentType: "application/pdf"
        },
        {
            filename: "image.jpg",
            content: imageContent,
            contentType: "image/jpeg"
        }
    ]
});

HTML Email with Inline Images

await email.send({
    from: "sender@example.com",
    to: "recipient@example.com",
    subject: "Email with Inline Images",
    body: `
        <html>
            <body>
                <h1>Welcome!</h1>
                <p>Here's our logo:</p>
                <img src="cid:logo@company.com" alt="Company Logo" />
            </body>
        </html>
    `,
    fileInline: [
        {
            content: logoContent,
            contentType: "image/png",
            contentId: "logo@company.com"
        }
    ]
});

Multiple Recipients with Attachments and Custom SMTP

await email.send({
    from: "sender@example.com",
    to: ["recipient1@example.com", "recipient2@example.com"],
    cc: "manager@example.com",
    subject: "Monthly Report",
    body: "Please find the monthly report attached.",
    attachment: [
        {
            filename: "report.pdf",
            content: reportContent,
            contentType: "application/pdf"
        }
    ],
    smtpServer: "smtp.myserver.com",
    smtpUsername: "username",
    smtpPassword: "password",
    smtpProtocol: "smtps"
});