Originally posted by Support 3:
Unfortunately, you can not change the default file name. ItemSaveMessageDlg() does not expose any parameters (it should).
FYI, see the post below to save the message:
Thanks. I followed the post and used ItemSaveMessage() with Mime type. But the attachments were not saved, and formatting of the mail contents were not retained. Are there other things that I should do before calling the method?