I'm trying to send a mail using Mail service SL.

I would like the body to be in HTML format for a nicer look. Which I managed to do, but only if I don't send an attachment.
Can someone help me with the settings on how to send an HTML body and attachment?

I used the Mail Service SL Example project, the only thing I added in the "Main_PRG" code in line 51 under "SendMailFB" is "mimeType := 1".

I'm using Library:
Mail Service SL Library Documentation
Company: CODESYS
Title: Mail Service SL
Version: 1.13.0.0
Categories: Application|Utils
Namespace: MAIL
Author: CODESYS Development GmbH
Placeholder: Mail_Service_SL