How to Open/ View Emails with Thunderbird Viewer tool?

Thunderbird Email Viewer tool to Read/View Thunderbird mail files and convert/migrate into different options


Download eSoftTools Thunderbird Viewer Software & view Thunderbird profile emails directly. Free of cost access/view emails from Thunderbird mail files without any email client dependency. Also, get the ability to export Thunderbird Mail files to Outlook PST and 10+ other conversion and cloud migration options with Pro/Pro plus edition.

Step-1) Download eSoftTools Thunderbird Viewer Software and open it on your computer.

Press "Add File/Folder" button from the first screen of the software.

Thunderbird Viewer Software Main Screen
Step-2) Choose a file selection method from the provided options:-
  • Select MBOX File:- Add a Thunderbird MBOX file manually.
  • Select MBOX Folder:- Select a folder having multiple sub-folders and MBOX files at once.
  • Auto-Load Thunderbird Profile:- Auto-detect thunderbird mail folders default location and load all in a single click.

Add your Thunderbird mail files or folders and hit on Next.

Thunderbird file selection mode
Step-3) Load all selected Thunderbird mail folder/sub-folder and files into the software.
Click on each Thunderbird email and view them individually.
Click on each email twice to generate its preview on separate screen.
preview Thunderbird emails

After viewing Thunderbird emails, users can Convert and Migrate Emails using with Thunderbird Viewer pro/pro plus edition by applying the below mentioned steps: -

Steps to Convert Thunderbird Mail files to PST, EML,EMLX, MSG, HTML, MHTML, Zimbra, NSF, Thunderbird : -
Step-4) To convert Thunderbird mail files, press the "Convert MBOX" button from top menu bar.
convert Thunderbird mbox in bulk
Step-5) From the next opened screen, choose a conversion format from the options - PST, EML, EMLX, MSG, HTML, MHTML, Thunderbird, NSF, Zimbra(TGZ).

    Select other required options-

  • Mail Filtering:- Filter mails by date and export emails of only required dates.
  • Naming Convention :- Provide numae to resultant file with different naming formats by email attributes- from, To, subject.
  • Saving Location:- Choose a location where you want to save resultant files.
conversion options
    Conversion formats:-
  • Single PST for All Mailbox: - Export all selected mail folders of Thunderbird profiles to single PST file
  • Single PST for each Mailbox: - Create separate PST file for each selected Thunderbird mail folder
  • MSG:- Preserve each Thunderbird Email to separate Outlook MSG file
  • EMLX:- Save Thunderbird email to individual Apple Mail EMLX files
  • HTML:- Convert Thunderbird emails to HTML files for web browsers
  • MHTML:- Save Thunderbird emails to separate MHTML files for web browsers
  • NSF:- Preserve all selected Thunderbird mail folder to single Lotus Notes NSF file.
  • Zimbra:- Save Thunderbird emails of all selected mail folders to TGZ files for zimbra desktop.
  • Thunderbird:- Import selected Thunderbird mail folders/files to Thunderbird profile default storage location
Step-6) Finally press the "Convert" button and start the Converting Thunderbird mail files.
Thunderbird file conversion process
Apply the steps mentioned below to migrate Thunderbird profile emails to Cloud mail apps: -
Step-4) Choose the required mail folders from your Thunderbird profile and then press the Import into Cloud button from menubar.
After that, apply the steps mentioned below to migrate Thunderbird emails to Gmail, Office365, Outlook.com, Yahoo and IMAP-based mail apps.
Thunderbird emails import to cloud
Migrate Thunderbird Emails to Office365 cloud: -
Step-6) Click on Import to Cloud button & choose the import to Office365 option.
Thunderbird to office365 button
Step-8) In the next opened screen, enter your Office365 account email address and click on "Convert".

Input your Office365 email address and password on the next screen and login with Office365 account details.

Thunderbird to Office365 login
Step-9) Login with your Office365 account into the softwae and start the Thunderbird to Office365 migration process.
Thunderbird to Office365 migration
Steps to migrate Thunderbird emails to Gmail Account:-
Step-6) Click on Import to Cloud button, then select the Import to Gmail/ G-Suite option.
Thunderbird to Gmail import
Step-8) In the new screen, input your Gmail account "Email Address" and "Google Third-Party App Password" & click the "Athenticate login" button.

Note: - For migration, users have to create Google Third party app password

Gmail account login
Step-9) After securely completing Gmail login process, press the Import to Gmail button and Thunderbird to Gmail migration.
Thunderbird to Gmail migration
Steps to Transfer Thunderbird Emails to YahooMail Account:-
Step-6) Click the Import to Cloud >> Import to Yahoo button from menubar.
import to cloud options
Step-8) Provide your Yahoo Mail account email address and third party app password, then click the "Athenticate login" button.

Note: - Create Yahoo Third party app password before migration

Yahoo mail login
Step-9) Create a connection with YahooMail account and press the Import to Yahoo Account button and start transferring Thunderbird emails to YahooMail.
import Thunderbird to Yahoo mail
Move Thunderbird Emails to Outlook.com/Outlook Web account:-
Step-6) Click the Import to Cloud button & select Import to Outlook.com/ HotMail option.
Import to Outlook.com option
Step-8) Enter your Outlook.com account email address, password, and hit the "Convert" button.
Outlook.com login
Step-9) Mkae a connection between the software and your Outlook.com or Hotmail account, and strat Thunderbird to Outlook.com migration.
Migrate Thunderbird to Outlook.com/HotMail
Steps for importing Thunderbird emails to IMAP Webmail accounts: -
Step-6) Click on Import to Cloud >> Import Thunderbird to IMAP option.
Thunderbird to Cloud options
Step-8) Input your IMAP account email address, and password then hit the "Convert" button.
login to IMAP account
Step-9) Connect the software toyour IMAP mail account and start performing Thunderbird to IMAP migration.
Migrate Thunderbird email to IMAP Server