Importing HTML Content For Campaing Email

Importing HTML Content For Campaing Email

When I important an HTML source into the site to send out emails I have the following problem:

ANY item such as a period (.) or an apostrophe (') or a comma (,) is converted into a strange symbol. See some examples below. 

How can I correct this?

Federal Reserve’s

September 2014.  

months ahead.†�

Thank you.