Rebex Mail Converter (free)

Intro

Rebex Mail Converter is a command line tool for converting mail messages between different formats.

It's free for commercial and non-commercial use.

Download

Download - Mail Converter Application »

Download - C# source code »

Usage

    Syntax:
     MailConverter.exe to-msg|to-mime [--ignore] <input path or mask> <output dir>

      -i, --ignore  Errors during conversion do not terminate the batch operation.
                    Optional argument.

    Examples:
     MailConverter.exe to-mime --ignore C:\input\* C:\output
     MailConverter.exe to-msg --ignore C:\input\* C:\output
     MailConverter.exe to-mime C:\input\*.msg C:\output
     MailConverter.exe to-msg C:\input\*.eml C:\output
     MailConverter.exe to-mime C:\input\mail.msg C:\output
     MailConverter.exe to-msg C:\input\mail.eml C:\output

    Exit codes:
     0 - Successfully converted all input files.
     1 - The conversion did not start (bad arguments or invalid input).
     2 - An error occurred during the conversion.
            

Source code

MailConverter is written in C# and uses Rebex Secure Mail component. Source code for the utility itself is freely available, making it possible to easily add equivalent functionality to custom applications. To compile MailConverter, download a trial version or purchase a license.

Compatibility

Supported e-mail message formats:

• RFC 822/2822/5322 - Internet Message Format
• MIME - Multipurpose Internet Mail Extensions
• Outlook MSG - native format used by Microsoft Outlook
• MS-TNEF/winmail.dat - Microsoft's proprietary email extension format (input-only)

Supported attachment formats:

• MIME (Base64, Quoted-Printable, 7bit, 8bit and binary entities)
• UUEncode
• Embedded OLE objects within TNEF/winmail.dat e-mail messages
• MS-TNEF/winmail.dat - Microsoft's proprietary email extension format (input-only)

Platforms

MailConverter runs on:

• Windows 10, 8.1, 8, or 7 SP1.
• Windows Server 2012 or later.
• Windows XP, Vista, 7, Server 2003 or 2008. You might have to install .NET 4.0 first when using the tool on these older systems.

Version history

1.1.0 (2021-08-30)

• Added switch --ignore to skip errors during batch conversion.
• Exit-code 2 is now returned for an error during coversion.

1.0.0 (2020-07-28)

• Enhanced compatibility.

1.0.0 (2019-06-20)

• Exit-code 1 is now returned even on a generic exception.

1.0.0 (2019-06-06)

• Command line syntax changed. Exit-code 1 is now returned on error.

1.0.0 (2019-04-12)

• Added support for multi-file conversion.

1.0.0 (2016-07-01)

• First standalone version released on labs.

1.0.0 (2011-02-11)

• First version of MailConverter released as a sample for Rebex Secure Mail component.

Contact

Have a feature request or a question? Contact us or ask at Rebex Q&A Forum.