How many versions of one mailing can be created within an A/B test?

As part of an A/B testing, you can create three different versions of your mailing. The best way, however, is to establish a maximum of two (that is A and B) versions, as this facilitates the subsequent analysis of results. Remember that for the test to give reliable results, the versions should vary in only one thing, e.g. the title or a link to the page with the content. Otherwise, you will not know which element had an impact on better statistics.