How to Import EML Files to Mailfence?

Admin | Email Conversion email migration How to's IMAP Software Technology | 4 minutes read | Modified on: 23-05-2026

If you’re among those seeking the answer for how to import EML files to Mailfence in large quantities without any restrictions. Then, you’ve come to the correct place, in just a few clicks, you’ll understand the quickest way to import several EML files into your Mailfence account.

Using Mailfence users can communicate privately and securely. The platform is dedicated to protecting global users’ data by ensuring end-to-end data protection for all emails, calendars, contacts, and documents.

Let’s understand what makes Mailfence the right choice to import your EML file.

Reasons to Convert EML Files to Mailfence

  • Mailfence provides end-to-end encryption, which makes storing and accessing email data safer on this platform.
  • Importing EML files from multiple clients can be consolidated into a single, secure Mailfence account. 
  • Once imported, accessing your emails from any device is seamless due to Mailfence’s web interface.
  • Mailfence adhered to the strict European data protection laws (GDPR), ensuring your data are safe. 
  • You don’t have to rely on local email clients and file viewers, once the data is imported.
  • Transferring your EML files into Mailfence, helps maintain backup of your crucial communication. 

How to Import EML Files to Mailfence? – Manual and Automated Way

Mailfence provides a manual option to import data, but the file size has to be 50MB. Making it difficult for users who want to bulk import files. Therefore in such a case a better option is using a software which doesn’t have size limitation and is much faster than the manual method.

But first let’s understand the manual method in case you have fewer files.

Manual Approach to Transfer EML files to Mailfence

You can move EML files to your Mailfence account using one of two manual methods. To make the transfer process smoother for you, we’ve described both approaches in detail below. 

Method 1: Directly Transfer EML files to Mailfence

  • Sign in to your Mailfence account.
  • Click the “Message Icon” at the top.
  • Click on the “More(…)” > then “import”.
  • Click “Import” > upload EML files.

Note: To preserve the folder hierarchy, if your EML files are arranged in folders, compress them into a.zip file before uploading. 

Method 2: Import EML Files via Mozilla Thunderbird

In order to transfer EML files to your Mailfence account, use the Thunderbird email client as a bridge. 

Step 1: Transfer EML files into Thunderbird

  1. Start Mozilla Thunderbird on your computer.
  2. Right-click on any Folders > select “New Folder”.
  3. Give a name > click “Create Folder”.
  4. Right-click on the new folder > select: ImportExportTools NG > Import Messages.
  5. Search the location where your EML files are saved.
  6. Select all files “Ctrl + A” and click “Open” the files into Thunderbird.

Once all your email files are uploaded successfully, then you can connect the two accounts Thunderbird and Mailfence.

Step 2: Connect Mozilla Thunderbird with Mailfence

  1. In your Mailfence account, go to: Settings > Messages > External Addresses.
  2. Choose “Gmail” or “IMAP” (depending on your Thunderbird configuration).
  3. Enter the email address and password specific to connect your Thunderbird account.
  4. Once connected, drag & drop the imported emails from Thunderbird into your Mailfence folders.

Drawbacks of Manually Importing EML files

  • Limited File Size: The maximum file or ZIP size supported by Mailfence’s web import is 50 MB. 
  • Time-Taking: For big batches of EML files, Thunderbird’s multi-step approach can be slow. 
  • Unsuitable for Bulk Migration: Transferring hundreds or thousands of files manually can be time-consuming and prone to mistakes.
  • Software Requirement: Mozilla Thunderbird and the ImportExportTools NG add-on must be installed on your computer to use this approach.  

How to Import EML Files to Mailfence? – Automated Approach

To avoid the limitations from the manual approach, try the CubexSoft EML Converter to transfer your EML files into your Mailfence account without any file size limitations. Users can easily import an infinite number of EML emails using this robust program. The EML to Mailfence Converter Tool’s advanced features assures a simple and friendly experience for all users, regardless of technical proficiency. 

The software ensures flawless data transfer with all attachments intact and supports EML files transferred from any mail client. It also provides a free demo version so you can try it out before buying it.

Stepwise to Transfer EML Files to Mailfence Account

  1. Install and Open the EML to IMAP Tool.
  2. Click on “Add Files” > “Select File(s)” or “Select Folder(s)”.
  3. Choose all the files or folders from the “Folder list” you want to convert.
  4. Click “Export”
  5. Select “IMAP Server” from the “Select Savings Options”.
  6. Enter your Mailfence login credentials to establish the connection.
  7. Optional Step to use the advanced features such as filtering by date range, sender, etc.
  8. Click “Convert” to start the migration process.
  9. An alert will let you know that the conversion is complete. Click “OK”. 

Why Opt-for Automated Software instead Manual Method?

  • The Tool supports emails exported from any email client, such as Entourage, Apple Mail, Outlook Express, eM Client, Thunderbird, Gmail, and more. 
  • Using the “Select Files” and “Select Folder” options, it is easy to add several EML files or entire folders with lots of emails. 
  • It allows bulk import without any file size limitations. 
  • Using advanced filter users can transfer particular emails based on criteria.
  • It maintains the original folder hierarchy.
  • The application is compatible with both Windows and Mac OS.

Conclusion

The best ways to import EML into a Mailfence webmail account using both manual and professional approaches are covered in this “how to import EML files to Mailfence” article. For a limited number of EML emails under 50MB, manual methods are effective. However, the professional IMAP Backup Tool is the best option if you need to move a lot of emails because it allows for a simple and straight transfer to your Mailfence account.