Attached DOS text files being converted to Unix text format

[Damián Rodrí­guez Sánchez]

Michael Schwendt escreveu:
> On Fri, 13 Mar 2009 14:06:50 -0300, Damián wrote:
> 
>> I've already sent this to a Mozilla Thunderbird list but received no 
>> answer yet.
>>
>> All e-mails I receive containing DOS text files are being converted to 
>> Unix text files when I save them. Unix text files are not changed. Other 
>> file formats are also not affected (zip, exe, doc, etc). I'm not sure if 
>> this is a Thunderbird problem. I'm running Thunderbird on FC9. Any help 
>> will be appreciated.
> 
> Tell a bit more about what encoding is used for the attachments.
> 

I had a look at my Sent file and what I can tell you is that text 
attachments show this:

Content-Transfer-Encoding: 7bit

while other formats (doc, zip,...) show this:

Content-Transfer-Encoding: base64