[imp] Problem detecting attachments

[Michael M Slusarz]

Quoting Philipp Fäustlin <philipp.faeustlin at uni-hohenheim.de>:

> Am 09.07.2013 05:36, schrieb Michael M Slusarz:
>> Quoting Philipp Fäustlin <philipp.faeustlin at uni-hohenheim.de>:
>>
>>> I have a problem, that Horde doesn't detect *.pdf attachments in  
>>> multi part emails.
>>>
>>> I first have to go to "show all parts" and then I see the attached  
>>> *.pdf  as shown in following list.
>>>
>>> Alternative
>>>   - Text
>>>   - Mixed
>>>      -- Text
>>>      -- 507.pdf
>>>      -- Text
>>>
>>> The source of the email also says:
>>> ----------------
>>> Content-Type: application/pdf; name=507.pdf
>>> Content-Disposition: attachment; size=67383; filename=507.pdf
>>> Content-Transfer-Encoding: base64
>>> ------------------
>>> but Horde won't detect it as attachment.
>>>
>>> I use the Horde Groupware Webmail Edition 5.1 (Imp 6.1.2).
>>>
>>> Do I have to change some config?
>>>
>>> Is this email not RFC conform?
>>
>> It was most certainly sent by Apple.  And it is known they have  
>> sent broken multipart/alternative parts since forever.
>>
>> That being said, the attachment *should* show up.  We will display  
>> the multipart part in this instance if ANY of the sub-parts are  
>> visible.  However, both of the text parts under the mixed part are  
>> most likely marked as "attachment" (and/or you have alternative  
>> viewing set to plaintext preferred).  PDF's are always treated as  
>> an attachment (there is no way to view them inline  
>> natively/cross-browser).  Thus, we fall back to the first text part.
>>
>> The **entire** purpose of using multipart/alternative is to hide  
>> all the display details from the end user.  You absolutely can't  
>> hide "attachments" under an alternative subpart because there is no  
>> guarantee that this part will ever be displayed.  In this case, the  
>> PDF is *not* an attachment; it is an alternative way to display  
>> text to the user.
>>
>> michael
>>
>> ___________________________________
>> Michael Slusarz [slusarz at horde.org]
>>
> Yes the email was sent by Apple, but I can reproduce the same  
> "fault" with an email sent through horde webmail.
>
> As example:
>
> In horde I write an email in HTML format. I write my text and then I  
> put an *.pdf and *.jpg per drag and drop into the email.
>
> The *.jpg is shown as expected, but the *.pdf is only shown as small  
> unidentifiable symbol.

This has nothing to do with Horde.  Your browser is reporting the PDF  
file as a MIME type other than a PDF mime type.

Second... you CAN'T drop a PDF file into HTML content anyway.  That  
won't do anything.  PDFs are not displayable in HTML content.

michael

___________________________________
Michael Slusarz [slusarz at horde.org]