Don’t forget the second subject line. In your subscriber’s inbox after your subject they see the first several words of your HTML email. If the first text in your HTML email is
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Unicode symbols are often call Glyphs and they draw a lot of attention in a subject line when used on occasion to draw a little extra attention. There are thousands and thousands of available Glyphs that you can use.
Email marketers know that the subject line is perhaps the number one most critical component to any successful email campaign. The subject determines if the consumer is going to open and engage with your email content or not.