Unable to send email in HTML

[Lucie]

I have no problem sending email in Scriptella in TEXT format using mail.jar driver.  However, I got the following error when trying to send it in HTML format.  This is a standard feature in Scriptella, so I must be doing something wrong:. 

Java version: 1.8

Scriptella Version: 1.2

Here's the error message: 

mail provider exception: Failed to send message

Error codes: []

Driver exception: javax.mail.MessagingException: IOException while sending message;

 nested exception is:

 javax.activation.UnsupportedDataTypeException: no object DCH for MIME type multipart/related;

 boundary="----=_Part_0_85777802.1634149530526"

[Lucie]

For anyone interested, I fixed the problem using suggestion recommended in:

https://stackoverflow.com/questions/21856211/javax-activation-unsupporteddatatypeexception-no-object-dch-for-mime-type-multi/21898970