Mailtrack does not affect whether your emails are delivered to the promotions tab.
Gmail classifies and delivers emails to the promotions tab based on complex and changing algorithms so there is no surefire way of knowing whether your emails will end up in the promotions tab, however if you follow deliverability best practices such as not adding lots of images or links to your emails this will normally help avoid them being classified as promotions.
Gmail classifies and delivers emails to the promotions tab based on complex and changing algorithms so there is no surefire way of knowing whether your emails will end up in the promotions tab, however if you follow deliverability best practices such as not adding lots of images or links to your emails this will normally help avoid them being classified as promotions.