Hello!
I need to set attachment name dynamically for receiver mail adapter. To achieve this I use Dynamic Configuration attributes:

and "Variable Transport Binding" in communication channel's properties:

But when I open the message using Outlook client I see the attachment name as "MainDocument.xml". It looks like Content-Description header was not set. But the other header - Content-Disposition - was set correctly. When I choose "Save as..." I see the file name I've set before.
What am I doing wrong? Couldn't you help me with this issue?
Regards, Evgeniy.