2 Methods to Convert OST Files to EML Format

OST files are the Offline storage table that stores a lot of information from emails, tasks, calendars, notes, and contacts. EML file on the other hand stores one email including the contents like attachment, message, date, receiver/sender details. With people using different emailing platforms nowadays, they require ways to convert the data from one type of file to other. Similar is the case with OST and EML files. The formats are different from each other in many aspects which make the users know ways to convert OST files to EML whenever needed.

Why save OST to EML Format?

  • Crashing System – While the exchange server is generally quite safe; there have been instances where the system gets crashed due to unwanted malware attacks.
  • Need to Backup – Just to take backup of the data that could come in handy in case of system failure or deletion of files. This will allow the user to use an EML file to access the data.
  • EML sharing compatibility – While OST files are not compatible with every other email platform, EML files can be accessed through many. Hence giving flexibility to the user of sharing the data with ease.
  • Using the other platform – Users can change their email platforms from time to time depending upon how convenient, easy, and cost-effective the platform is. As mentioned EML files can be used by many platforms allowing the user to transfer the data easily from the old platform to the new one.

Best ways to convert OST files to EML format

There are two ways of converting OST to EML. You can use either of them at your convenience.

  1. When the OST files are connected to the Exchange server. Though there are some pre-requisites before performing the steps for this method.
    • An IMAP Gmail account configured into MS Outlook is a must.
    • Use of email clients like Mozilla Thunderbird, Windows Live Mail, Zoho Mail, etc. that supports EML format.
  2. When the OST files are not connected.

Let’s see the step-by-step guide for the first method.

When OST files are connected to Exchange Server

After you have confirmed the pre-requisites on your system you can follow the steps mentioned below.

  1. Copy OST files to Gmail – First step is to copy the OST file to the configured Gmail account. You can just select the file and drag and drop it.
  2. Configure Gmail account in Thunderbird – In this step, you need to configure the same Gmail account in the Mozilla Thunderbird since it supports EML files. You will be able to see the OST file in Thunderbird after the configuration is completed.
  3. Save as into EML format – The user can get the EML format files from Thunderbird directly even by drag and drop. Just pick the OST files from Thunderbird and drop them in a preferred location on your system.
When the OST file is not connected

The user can take the help of any third-party Best OST to PST Converter tool such as OST to PST converter or any other professional tool in this case. The third-party tools provide a solution for the not connected OST files and with that have many other features. It will save time, perform the tasks easily, and can perform the multiple OST files which are not possible in manual ways.


OST and EML file formats are different from each other and therefore the users should learn how to convert from one format to another. Converting OST to EML can be done in two methods. OST to PST tool provides benefits for the user in many ways. However, if the manual method does not work you can opt for a third-party tool.

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  1. Above solution makes my way easier to convert OST file to EML format. Thanks to the experts which provides this useful solution. After then I used it many times.

  2. Because of several reasons I wanted to convert OST to EML format and I took help from given blog. Manual method gave me direction to convert OST file to EML format. Thanks you to the team which made this method so helpful and efficient. I used it many times over then.

  3. To convert OST file to EML format I used given manual method. This method helped me in every step of process. Both situation in which OST file connected or not connected with Exchange server included. I appreciate this wonderful manual solution.

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