Exchange Emailer 🐍

ExMailer is a robust Python library designed for robust interaction with Microsoft Exchange Servers (EWS). It solves the complexity of NTLM authentication and provides a flexible, HTML templating engine out of the box.

Features

• Microsoft Exchange Integration: Seamless connection to Exchange servers using NTLM authentication
• Rich Email Formatting: Professional HTML email templates with customizable variables
• Attachment Support: Handle multiple file attachments with automatic MIME type detection
• Flexible Configuration: Support for environment variables, JSON config files, or programmatic setup
• CLI Interface: Command-line tool for quick email sending
• Comprehensive Error Handling: Custom exceptions for different failure scenarios
• Secure SSL/TLS: Proper certificate verification and secure connections
• Logging Support: Verbose mode for debugging and troubleshooting

Installation

Requires Python 3.11+

pip install exmailer

Quick Start

Using Python API

from exmailer import ExchangeEmailer

with ExchangeEmailer() as emailer:
    emailer.send_email(
        subject="گزارش هفتگی",
        body="لطفاً گزارش پیوست شده را بررسی نمایید.",
        recipients=["manager@company.com"],
        template=TemplateType.PERSIAN,  # Uses built-in RTL template
        attachments="./report.pdf",
    )

    # Send a standard English/LTR email
    emailer.send_email(
        subject="Weekly Report",
        body="Please find attached.",
        recipients=["colleague@company.com"],
        template=TemplateType.DEFAULT
        attachments="./report.pdf",
    )

Custom Templates

You can register custom HTML layouts for newsletters or alerts:

from exmailer import ExchangeEmailer, register_custom_template

html_layout = """
<div style="border: 1px solid #ccc; padding: 20px;">
    <h1 style="color: navy;">Company Alert</h1>
    {body}
    <hr>
    <small>Confidential</small>
</div>
"""

register_custom_template("alert", html_layout)

with ExchangeEmailer() as emailer:
    emailer.send_email(
        subject="Server Down",
        body="<p>The main database is unreachable.</p>",
        recipients=["devops@company.com"],
        template="alert"  # Use the registered name
    )

Using CLI

python3 -m exmailer \
    --subject "Weekly Report" \
    --body "Report content here" \
    --to recipient@company.com \
    --attachments ./report.pdf

Configuration

ExMailer looks for exmailer.json or exmailer.yaml in your current directory or ~/.config/exmailer/.

Set environment variables .env:

EXCHANGE_DOMAIN="CORP"
EXCHANGE_USER="jdoe"
EXCHANGE_PASS="secret_password"
EXCHANGE_SERVER="mail.corp.com"
EXCHANGE_EMAIL_DOMAIN="corp.com"
EXCHANGE_AUTH_TYPE="NTLM" # or BASIC

Or use a JSON config file exmailer.json:

{
  "domain": "CORP",
  "username": "jdoe",
  "password": "secret_password",
  "server": "mail.corp.com",
  "email_domain": "corp.com",
  "auth_type": "NTLM",
  "save_copy": true
}

Requirements

• Python 3.11+
• Microsoft Exchange Server access
• Valid domain credentials

Author

Sadegh Yazdani

License

GNU General Public License v3 (GPLv3)