What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Custom CSS codes in the Notification/Autoresponder email is possible, but we advise to place it inside the table tags, use the same formatting. Example, add the Custom CSS into the following existing lines:
Using ID/Classes/Names into the settings is NOT possible because the Source Editor will place the codes inside the pharagraphs tags. Example, when you save the custom CSS, this the result:
If you have any further questions, let us know and we will be happy to help.
I will rewrite the code, I suppose.
You can see more about that here: http://www.w3schools.com/html/html_css.asp (just scroll a bit down to Inline Styling (Inline CSS) section.
You could also copy the HTML code from within the email autoresponder and use their try it now option if you not too familiar with the CSS.
Inline CSS Try It Now option from w3Schools.com