Did you knew that nearly 30 percent of marketers duplicate their site navigation in email ? Of those, 15 percent find it more effective than the main content in driving clicks, while 11 percent of marketers find their navigation converts better than the main content of their email.
Using site navigation as part of your email design can keep the user experience consistent from email to website. E.g. email strategies based on transactional messaging can use these site navigations to drive traffic to their websites.
Conclusion: Try to keep the user experience consistent from email to your website.