Sylpheed is an open-source email client that offers cross-platform compatibility and functionality among operating systems such as Mac, Linux, and Windows. With stunning features and easy configuration requisites, Sylpheed can be considered a modern-day email client. It also provides features like spam filtering, password protection, and message encryption to maintain the security and integrity of data. With the availability of an intuitive user interface, Sylpheed can be perfectly handled by the user of any category, whether tech or non-tech. To support the file format, Sylpheed uses GTK+GUI tool kit, and the default format for storing emails and attachments is MBOX (with no extension).

Despite having several advantages, Sylpheed email client still lacks email functionalities and security features compared to advanced platforms such as Outlook. Moreover, many individual professionals and organizations all over the globe prefer Outlook over other email clients. Outlook provides robust features and functions to seamlessly manage and store your data in PST (Personal Storage Table) file format.

Why do you need to migrate from Sylpheed to Outlook?

There are various reasons why users are switching from Sylpheed to Outlook. Some of the prominent reasons are listed below:

  • Outlook stores and manages the data of its users efficiently.
  • Outlook provides a user-friendly interface to make work easy and simple.
  • Outlook is compatible with Office 365 and Exchange Server.
  • Outlook provides a high security system and filters option to customize your emailing experience.

How to migrate mails and attachments of Sylpheed to Outlook?

Sylpheed and Outlook, both email clients, store mailbox data in different formats, making the migration task complex. However, if any user is willing to migrate emails and attachments of Sylpheed to Outlook, then an advanced migration tool is required because both platforms don’t facilitate any direct conversion method. Therefore, the best method for users is to rely on Kernel for MBOX to PST, which is specially designed to perform the conversion smoothly. Apart from its prime function, it does provide other benefits which prove to be helpful for all the users-

  • It maintains data integrity throughout the conversion process.
  • The tool supports around 20 MBOX email clients like Sylpheed, Thunderbird, PocoMail, Eudora, Apple Mail, etc.
  • The mailbox items can be saved into PST, DBX, EML or MSG file formats.
  • There are various filters available which help to narrow down the search.
  • This tool is compatible with all the versions of Microsoft Outlook.

Step-by-step guide for Sylpheed to Outlook migration

Follow the instructions given below carefully to migrate mails and attachments of Sylpheed to Outlook:

  1. Launch the MBOX to PST software on your system.
  2. Click on the Browse button to locate the Sylpheed MBOX folder. You can choose between the Select Folder and Select File option depending on the number of files. Browse Sylpheed MBOX folder
  3. Select the required folder and click on OK, then click on the Finish button. Add Sylpheed files
  4. The tool will provide a preview of the mailbox data. Click the Save button to proceed. Preview of MBOX file
  5. To convert the files in PST, select the output format as PST file (MS Outlook) and click Next. Select PST as a saving file format
  6. Apply filters to save specified data; for instance, you can use options like From, To, Subject, Folder Name, Item Type, and Date Range. Click Next once you are done filtering the data. Apply filter option
  7. For huge files, you can use the Split option available in the next window. Also, you can add a Prefix to the file name to give it a unique identity. This window is optional so you can skip this one in case you don’t want to make any changes. Click Next. Opt for the Split option and select prefix
  8. Specify a destination path for saving the converted file through the Browse button. Then, click Finish to execute. Provide location to save PST file
  9. You will get a notification regarding the successful completion of the conversion task. Click OK to exit. Sylpheed to PST conversion done


Outlook provides additional features and greater flexibility due to its compatibility with Office 365 and the Exchange server compared to the Sylpheed email client. So, because of this Sylpheed’s users are switching to Outlook. Therefore, in the article, we have provided a best-suited method for Sylpheed to Outlook migration using a professional Kernel for MBOX to PST tool.