I am trying to align a part of text to the right and the other part to the left in an HTML mail but in Outlook the float doesn\'t work. So basically I am lookin
Honestly, if you're doing an HTML email I'd stick to using tables. Not all CSS selectors are available in all email clients and you'll drive yourself mad trying to do it any other way. HTML emails are like the web 5 years ago.
There are a couple of good documents on the subject:
https://www.campaignmonitor.com/css/
http://www.emailology.org/
For your example:
First part
Second part
It's horrible but unfortunately it's still the best way.