Anyone who has worked on making detailed sites knows of the trouble that it can be. Creating HTML and CSS pages that are seamless and work on all browsers with no glitches can be tough. Making sure that you have the right content and working with the right style templates is a huge advantage, but for those who want to step it up even one more notch working with a shortcut and aid like WordPress is a wise investment of time.
The Details are important _ Pay special attention to the details. They affect your readers very much. Details like alignment of the texts and the number of lines which your paragraphs include, can make readers bored or can interest them. Try not to make your paragraphs longer than 3 or 4 lines. When your paragraphs are short, people will read them easily. But if they are long, it will seem overwhelming to people. The colors you use in your newsletter design is important as well. So you should know a little about colors psychology. It's not hard. You must already know about the effect of every color on people, before designing or choosing your newsletter template.