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Convert EML to PST

Convert EML to PST
Converts EML and EMLX files to Outlook PST format. It is possible to retain the original folder structure.
Version: 4.21 released on May 11, 2023.
Tags: convert eml pst
(4.5 / 745 reviews)

Convert EML to PST for Outlook
You can download a free limited version down below

Main features

  • Convert email message files from EML to PST format without any data loss. Save original formatting and metadata like subject, sender and recipient addresses, date and time; as well as the links and attachments.
  • Create one or more PSTs from any number of EML files in different folders, depending on the settings of the utility.
  • Immediately split the resulting PSTs by size or by year when converting EML messages.
  • Avoid duplicates moving the source EML files to another folder during the conversion.
  • Decode Winmail.dat and other TNEF attachments.
  • Convert EML to PST without launching email applications.
  • Perform the EML2PST conversion by schedule or in batch files, using the command line capabilities.

Why convert EML emails to PST?

Messages in EML and EMLX formats are used by different email clients: Windows Live Mail, Mozilla Thunderbird, Apple Mail and others. Still MS Outlook does not work directly with this format.

You have two options for handling EML emails in Outlook:

  • Outlook uses PST data files to store your email. This is the native format of the message base. After the messages are transformed into PST, the resulting data file can be opened in Outlook.
  • What is the difference between importing EML into Outlook and converting it to PST?

    The conversion from EML/EMLX files to PST is similar to the importing EML into Outlook, with a few exceptions:

    • When converting, the utility uses the existing PST files or can create new ones. When you import messages into Outlook, you must select only an existing mailbox, PST data file, or Exchange Server public folder.
    • During the EML2PST conversion, you can use macros in the final data file name. Sort messages by date, sender and recipient data, and other messages fields. You can use the date and Windows environment variables, creating sets of data files in the way you want.
    • During the conversion, the resulting PSTs can be split by size. The maximum size of PST files is limited, and an additional operation to split them is not required in case of using the utility.

    Sometimes, EML2PST conversion is necessary, instead of importing EML into Outlook. For example, you must create a separate data file for each year, month, or day, saving messages from cloud or NAS. Another example is migrating old user mailboxes.

    Migrating an old email database from EML format into Outlook

    The utility for EML2PST conversion is especially useful in migration or preparation for migrating an old email database from EML format to Outlook and Exchange Server mailboxes. With the help of the utility you can migrate archive mailboxes without importing and connecting them to Outlook. Checking the folders with the source files you can estimate the size of the new message database and migrate the data in parts, using the advanced settings of the tool.

    How to convert EML to PST format?

    Perform the EML2PST conversion by configuring the utility step by step in the way you need:

    1. Launch the utility.
    2. Specify the source folder with EMLs.
    3. Mark "Include subfolders" to preserve the original folder structure.
    4. Specify the target PST file or create new data files with ready-to-use macros.
    5. Specify the maximum PST file size if needed.
    6. Optionally indicate the destination folder in the final PST file.
    7. Run the utility.

    More benefits with the advanced settings:

    1. Choose whether or not to include Internet headers in the final PSTs.
    2. Optionally mark proceeded messages as read.
    3. Convert the emails with or without attachments only, if necessary.
    4. Convert the files of the required size, automatically skipping larger ones.
    5. Move processed source files to another folder, at your choice. Here, when you run the utility again on the same source folder, no duplicate messages will be created in PST files.

    What data is saved when converting EML to PST?

    The messages in the resulting PST files will be the same as if you received them directly in Outlook. All images, HTML formatting, attachments, and headers will be retained in the original form.

    How to convert EML to PST in bulk or on schedule?

    For converting multiple files by schedule or in batch files, use the command line capabilities. By using the command line, you can create mail migration scripts for any number of users in organizations of all sizes. Just set the automatic launch of the utility using familiar Windows tools like PowerShell.

    Customer questions and solutions

    Client interaction history on solving different questions, tasks and challenges.

    Transferring Apple Mail EML messages to PST

    Q: Is it possible to migrate EML messages to PST format by selecting a copy of the Apple Mail folder located in ~/Library/v5? As far as I can understand, it will convert all messages within the v5 folder.

    A: Our utility works with *.emlx files directly. If you run the utility on the V5 folder it will re-create the whole directory structure, like: 1323DD52-F75C-45A6-ABE2-321194723269\INBOX.mbox\FDC0BE4D-B6E5-4FF4-95D8-DDC624523A73\Data\0\3\1\Messages\ Another option is to copy all *.emlx files in a single folder and then convert them. You can also re-arrange messages on import using macros in the "Destination folder in PST file" option.

    Q: If the client has created subfolders in Apple Mail, will they appear in Outlook?

    A: Our utility doesn't work with Apple Mail directly. If you create any folder on a disk, for example, "Invoice", the program will create a folder with the same name in the PST. If you create such a folder in Apple Mail then the name of the folder on the disk will be "Invoice.mbox" and it will be placed in the "Inbox.mbox" folder. In this case our program will re-create the whole complicated folder structure if you select the "Include subfolders" option.

    Failed to import EML to Outlook PST

    Q: I'm unable to import EML files to my Outlook 365. I'm getting a lot of errors.

    A: According to the information you provided, your mailbox is full: "The Outlook data file G:\Mails\Storage Folders.pst has reached the maximum size. To reduce the amount of data in this file, permanently delete some items that you no longer need." You can split the PST file, change the maximum PST size with the free ReliefJet Tweaker from ReliefJet Quicks bundle, or use another PST file.

    Limitations on number of accounts/files/emails

    Q: I have a large amount of files to convert. It has been recommended to me to purchase ReliefJet; just want to ask a few questions before I purchase: What is the cost? Is there a limit to how many emails I can import into Outlook? I also need to import emails from Zimbra (.eml files) into Outlook (.pst files) and have 6 staff email accounts I need to do this for.

    A: We have different editions of ReliefJet Essentials. You can find prices on our website. There is no limit on a number of emails in the registered version (any edition). You can install the program on one PC. A number of accounts or PST files conversions are not limited.

    OutlookFreeware.com Outlook Ribbon
    All utilities easily integrate with Outlook (optionally)

    * This utility is for non-commercial home use only. It will not run in domain enviroment. Some of the described features and support for domain enviroment are available in advanced version of the utility only. Free version may have additional limitations.

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