How can I change Content-Type in outlook 2013?

Question

I'm using web based outlook 2013 and I want to change the content-type form 'multipart/alternative' to 'text/plain' because some mailing list forbid the first choice.

fatal: Sorry, I don't accept messages of MIME Content-Type 'multipart/alternative' (#5.2.3). Sorry, for security reasons this list only accepts plain text email and no large attachments. Please configure your mail client accordingly

So, any ideas about how to change the content-type?

Answer 1

When you are logged into Outlook.com, create an email. At the top there is an Option button. Click that and choose plain text.

There is not an option to always have Outlook.com do this, so you will have to change it manually for those messages you want in palin text.