How to Import .eml Files to Kerio Connect without Any Data Loss?

Sarabjeet Kaur | eml file conversion software technology | 6 minutes read | Modified on: 08-04-2026
import eml to kerio

In this blog post, you’ll learn how to import .eml files to Kerio Connect using both manual and automated techniques with clear, step-by-step guidelines. We’ll also cover the restrictions of each approach, share expert tips and highlight the most effective method to handle batch conversion without any trouble.

Importing EML files into Kerio Connect has become a common requirement for users looking to convert and manage their email database within a centralized server environment. But, Kerio Connect doesn’t provide a direct built-in option for this task. That’s why, in this write-up, we’ve outlined all the practical and working solutions to help you successfully complete the migration. Read the full segment to explore the best ways and find answers to all your questions.

What is an EML File?

An EML file is a standard email file type utilized to store single email messages. It contains the complete email data, including the message body, subject, sender/receiver details, attachments, and metadata. EML files are widely supported by various email clients such as Outlook Express, Windows Mail, Thunderbird, and others, making them a common choice for email storage and migration.

What is Kerio Connect?

Kerio Connect is a powerful email and collaboration server designed for businesses to manage emails, contacts, calendars, and tasks in a centralized environment. It offers features like secure messaging, shared folders, mobile synchronization, and easy administration. Kerio Connect is often used as an alternative to larger email servers, providing a user-friendly interface along with strong performance and reliability.

Reasons to Import .eml Files to Kerio Connect

  • Importing EML files in Kerio Connect helps you store all your emails in one place, making it easier to access, organize, and manage data efficiently.
  • It allows users to migrate emails from different email clients (like Thunderbird or Windows Mail) to Kerio Connect without losing important data.
  • Kerio Connect provides enhanced security features, ensuring your imported emails are protected from data loss, unauthorized access, and threats.
  • Once imported, emails can be accessed anytime from multiple devices, including desktops, mobiles, and web browsers.
  • Kerio Connect maintains a proper folder hierarchy, helping users keep their emails well-structured and easy to find.
  • By moving emails to Kerio Connect, teams can collaborate better using shared folders, calendars, and contacts in a single platform.

Expert Tips for Smooth EML to Kerio Migration

Follow these essential tips before starting the process to import EML to Kerio Connect:

  • Keep a Backup Ready: Always create a backup of your EML files so you can restore your data if anything goes wrong during the migration process.
  • Organize Your EML Files: Place all EML files into a single folder. This makes it easier to import them in bulk without repeatedly searching for individual files.
  • Check Mailbox Storage: Make sure your Kerio mailbox has enough storage space to accommodate all the emails you plan to import.
  • Perform a Test Import:  Before importing the entire dataset, try importing a few EML files first to ensure everything works correctly.
  • Ensure Stable Internet Connection: A fast and stable internet connection helps prevent interruptions and ensures a smooth migration process.

Manual Method to Import EML Files into Kerio Connect

If you prefer not to use any third-party tool, you can transfer EML files to Kerio Connect using an email client like Thunderbird. However, keep in mind that this method is best suited for small-scale migrations due to its limitations.

Step 1: Set Up Kerio Connect in Thunderbird

  • Open Thunderbird on your system.
  • Go to Menu > New Account > Email.
  • Enter your name, email address, and password.
  • Choose IMAP and verify using OAuth authentication.
  • Once completed, your Kerio account will be successfully configured in Thunderbird.

Step 2: Install ImportExportTools NG Add-on

  • Open Menu > Add-ons and Themes in Thunderbird.
  • In the search bar, type ImportExportTools NG.
  • Click Add to Thunderbird and restart the application.

Step 3: Import EML Files into Kerio

  • Right-click on any folder in your Kerio mailbox where you want to import emails.
  • To create a new folder: Right-click > New Folder > Enter a name.
  • Again, right-click on the selected folder.
  • Choose ImportExportTools NG > Import EML Files > All EML messages from a directory (and subdirectories).
  • Select the folder containing your EML files.

This is how you can manually import EML files into Kerio Connect. While the process is straightforward, it comes with several limitations that you should consider before proceeding.

Limitations of the Manual Approach

  • Time-Consuming Process– Importing a large number of EML files can take a significant amount of time.
  • Performance Issues– The system may slow down, and Thunderbird can freeze during the process.
  • Folder Structure Issues– The original folder hierarchy may not be preserved properly after migration.
  • Dependency on Synchronization– The process relies heavily on proper syncing with Kerio Connect, which can sometimes fail.
  • Internet Dependency– A slow or unstable internet connection may interrupt the process and lead to data loss.
  • Requires Technical Knowledge– The steps can be complex for non-technical users and may lead to errors if not followed carefully.

How to Import .eml Files to Kerio Connect? – Expert-Recommended

The BitData Migration EML Converter is a professionally trusted and perfect solution designed to import EML files directly to Kerio Connect without the need for any email client. It offers a simple and user-friendly interface, making the entire migration procedure quick and hassle-free, even for home users.

This advanced EML Email to Kerio Connect Tool allows users to process bulk EML files efficiently without worrying about data loss or system performance problems. It preserves the original email formatting, attachments, and folder structure throughout the task, ensuring data integrity and proper organization.

To experience a smooth and seamless procedure, you can download the EML File Converter Program and try its free demo pack before making a full purchase.

Simple Steps to Import EML Files to Kerio Connect

Follow these easy steps to complete the EML to Kerio Connect migration process:

  1. Start by downloading and installing the EML to Kerio Converter on your system.
  2. Select EML files or entire folders using the dual selection options provided by the tool.
  3. Verify the uploaded files by checking them within the software interface before proceeding further.
  4. Select IMAP as the saving option and enter your Kerio Connect account credentials as required.
  5. Use the available filter options to customize the migration process based on your needs.
  6. Finally, click on the Convert button to begin the process of importing EML files into Kerio Connect.

Top Benefits of Professional EML to Kerio Import Tool

  • Bulk Import Support: Easily import multiple EML files in one go without any size or quantity limitations.
  • User-Friendly Interface: Designed for both technical and non-technical users, making the tool simple and easy to operate.
  • Standalone Utility: No need to install any external email client to perform the EML to Kerio migration.
  • Fast & Secure Migration: Ensures a quick process with zero data loss and no compatibility issues.
  • Advanced Filter Options: Provides smart filters to selectively import specific emails, saving both time and effort.
  • Complete Data Integrity: Maintains attachments, metadata, and all email properties without any modification.
  • Folder Structure Preservation: Keeps the original folder hierarchy intact, ensuring emails remain well-organized.
  • Direct Import Option: Allows users to directly import EML files into Kerio Connect in just a few clicks.
  • Free Trial Version: Offers a demo edition so users can test features before buying the full license.
  • Wide Compatibility: Fully compatible with all major editions of macOS and Windows OS.

Conclusion

The process to import EML files to Kerio Connect can be done utilizing both manual as well as expert techniques, but the right choice depends on your needs, while the manual approach using Mozilla Thunderbird is suitable for small tasks, it can become complex and time-taking for large database, whereas a powerful automated program like EML to Kerio Migration Tool offers a quick, more secure, and hassle-free conversion with complete data safety, making it the ideal option for bulk EML transfers, and users can also rely on dedicated support in case of any issues.