Sending multipart mail in java with inline HTML

Question

I am working on sending multipart email. My first part of the email is text and the second part is html. I followed

Best Practices - Sending javamail mime multipart emails - and gmail

but instead doing:

Multipart multiPart = new MimeMultipart("alternative");

I am doing:

Multipart multiPart = new MimeMultipart("mixed");

This is triggering HTML part of the mail as attachment in outlook. However, gmail works just fine for the same code.

Any suggestions?