why does my D2009 exe produce emails with attachments named ATTnnnnn.DAT

Question

Why does my D2009 exe produce emails with attachments named ATTnnnnn.DAT when the same source code compiled in D2007 produces emails with attachments correctly named with th

Answer 1

The recommendations of Richard worked for me. I compared the message sources of a correct attachment and that of Indy. Put the semicolons behind Content-type and Content-disposition (around line 1220 indeed, and it works. Thank you Richard!