CSS and ActionMailer in Rails3.

Lately, I was working on a project where I found an issue that emails sent using ActionMailer were not applying css styles to the html elements of the email. On adding style tag in the email view files, I was able to view stylings on thunderbird mail and ymail but still I was unable to view css stylings for emails in gmail. On furthur investigating the issue, I found that gmail requires inline stylings to be applied to the email templates. I found some gems which could fix this problem by converting external css to inline css. I tried the