I need to insert a 2px wide vertical line on either side of my responsive email after the email banner at the top. So that the entire body content of the email sits between these two lines. Does anyone know how to do this? I'm not a developer and have used some basic templates available to me. I normally just google for html help and literally cut and paste the code I need. However I can't seem to find anything on the internet for this specific thing I need done.
Thank you!