One usually uses the valuable Preheader space, therefore, a real life a/b test should allow the preheader to be tested along with the subject line, not subject line alone.
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I wanted to do an A/B test, basically flipping the Subject line with the Preheader as that's usually the next best text to use and test, yet one of them then will have the Subject and Preheader the same seeing as you can't adjust, basically redundant and will look like a mistake to some. (and have the preheader show in final review as others have already suggested.) Thanks
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I know plenty have asked to allow Exclude Lists at time of send, but in the least offer a NOT this list in the chain of rules within Segment creation
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