Send Mail action with attached files

Hello,

I'm having some problems when I try to attach files to an email. The email is sent with an attached file, but it appears as ATTACH.TXT regardless the AttachmentMimeType property specified. I tried both PDF and PNG files.

If I save that file and then rename it as .PDF or .PNG I can open the file without problems.

I'm using version 12.0.1 and Microsoft Outlook 2003.

Do you know how can I solve this problem?

Best regards.