PHP邮件mime和Outlook 2010无标题的附件

Question

I'm using Pears mail mime to send out emails with attachments in php.

http://pear.php.net/package/Mail_Mime/redirected

It seems Outlook is renaming PDF's to "Untitled..." but it works correctly for gmail, hotmail etc.

Prior to this problem I had another problem where Outlook would not show the file as PDF and attach it as text file unless I specifically tell the mime addAttachment the file type

see the code here:

if (endsWith($file,".pdf")) {

     $mime->addAttachment($file,'application/pdf',basename($file));

}
else {

        $mime->addAttachment($file);

}

You can see above I've also tried setting the 3rd argument of addAttachment to set the filename, but that hasn't worked either.

Outlook does not rename other file types so it's a catch 22 either set no filetype and have Outlook send as txt file or set the filetype and Outlook renames the files to 'Untitled'

Answer 1

ok found out that Outlook doesn't seem to like long filenames, shortening the filename works.

Pear mime sends a long filename header broken up into parts like this:

Content-Transfer-Encoding: base64
Content-Type: application/pdf;
name*0*=US-ASCII''THIDSO5749_010.901%20-%2013.95505142_GARUDA%20RETARGETI;
name*1*=NG%20CPA%20CAMPAIGN_PT%20GARUDA%20INDONESIA%20%28PERSERO%29%20TBK;
name*2*=._NOV2013.pdf
Content-Disposition: attachment;
filename*0*=US-ASCII''THIDSO5749_010.901%20-%2013.95505142_GARUDA%20RETAR;
filename*1*=GETING%20CPA%20CAMPAIGN_PT%20GARUDA%20INDONESIA%20%28PERSERO;
filename*2*=%29%20TBK._NOV2013.pdf;
size=68426

Outlook can't handle this but it can handle the format:

Content-Type: application/pdf;name="a long filename.....pdf"

Unfortunately it seems Pear mime can't send this format without editing the core code of mime.php

So I'm just sending shorter filenames for now