Hi @ll,

some customers noted that they are missing attachments we sent from one of our 
OTRS instances (3.2.10). Further investigation showed that the mime headers are 
looking strange (beside the fact that the destination exchange server changed 
them). The mail is defined as
--
Content-Type: multipart/related; boundary="----------=_1384847952-14819-1"
--
Which is wrong to my eyes. "multipart/related" means that the sub MIME parts 
are actually related to each other, which is not true for any attachment in 
OTRS I can think of. Of course if I send several attachments, these could be 
related to each other, but
a)      OTRS could not know about it, and
b)      At least two parts (the plain and html body) don't belong to this 
maybe-"related" attachments

Furthermore the "Content-Disposition" header for the attachment is set to 
"inline" - shouldn't that be "attachment"? Which attachment do you think of to 
show up inline?

I'm not sure if one of these (or both) is the reason why the attachment doesn't 
show up at our customers (yes, there are several with this problem); I also 
don't know which client they use (our outlook shows the attachment). But either 
way I would like to have an explanation why these headers are choosen.

EDIT: Just took a look into the source. Maybe this community or even the 
developer of OTRS are not the correct contact for this problem, as for MIME the 
perl module "MIME" is used. Anyway: someone here with an idea?!

Regards
Jan Dreyer

PS: Oh my, no idea why I sent this mail to otrs-bounces first (yesterday). At 
least it goes to the correct recipients now. Sorry to the list-moderator for 
that.
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