Unfortunately, there isn’t an end-all, be-all answer for that question. It varies depending on your email list and recipient preferences. To figure out what works best for your readers, try different days and times and analyze the results.
Combining Email Marketing with Other Types of Marketing
Whether you choose to do your marketing online or offline, one thing does not change. This is the concept that no single marketing strategy will be as effective as a combination of two or more marketing strategies.