How To Boost Email Open Rates With Magnetic Preheader Text (The Ultimate Guide)
Sadly, some designs don’t support visible preheaders. And, the character limit can be a bit annoying. A hack you can use to overcome both challenges is using the hidden HTML preheader text. You can put the invisible text into your emails but it won't surface in the body. However, it'll still be seen in the message preview. To do that you need to do a bit of coding.