After following the tips given here, the preheader still displays extraneous, unappealing characters unless the preheader contains more than 228 characters with spaces (194 without). This is the code I used beneath the opening body tag: Lorem ipsum dolor sit amet, consectetur adipiscing elit. The span class and style values are taken from the Design Editor after I entered the placeholder texts in the preheader field. I also tried without using and applying those class and style values directly ...