RFC822 EML Support

0 votes
asked Jan 30, 2013 by apdc (140 points)
edited Jan 31, 2013

Hi, was wondering if Rebex Secure Mail supports EML made by Lotus Notes or "RFC822"? I could not get certain .EML files to parse properly.

Applies to: Rebex Secure Mail
commented Jan 30, 2013 by Lukas Pokorny (128,250 points)
edited Jan 31, 2013

Yes, RFC 822 messages should be supported, although some obsolete features might not fully work. Would it be possible to mail a sample of such .EML file to support@rebex.net for analysis? We should be easily able to tell what's wrong. (Please make sure to send the .EML file in a ZIP archive to prevent mailservers along the way from modifying it.)

1 Answer

0 votes
answered Jan 31, 2013 by Lukas Pokorny (128,250 points)
edited Jan 31, 2013

After looking into a supplied .EML file, it turned out the issue is different than what I originally thought.

The .EML file was not an old-style RFC822 message, but a broken MIME message that actually violates both not only RFC 822, but its newer versions (RFC 2822, RFC 5322) as well:

  1. It uses wrong end-of-line sequence (0A instead of 0D 0A).
  2. It contains an empty line at the beginning – before the actual headers (an empty line indicates end of headers and can't be the first line in a file because header-less messages are invalid).

To fix the message, use the following code:

    string contents = File.ReadAllText(path);
    contents = contents.TrimStart('\n').Replace("\n", "\r\n");
    File.WriteAllText(pathFixed, contents);

The fixed message can be loaded both by Rebex Secure Mail and third-party applications.