Even though it is perfectly acceptable and is a common practice to use the 8_stage classic model for the e_marketing plan as well, you might want to consider the simplified version proposed by Chaffey, who identifies four major steps to build the e_marketing plan:
Analyzing the Market: You cannot afford to operate on the basis of assumptions about the market and customers. You need to conduct a thorough analysis of the prevailing market environments, your strengths & weaknesses and the existing competition. Study your target customers and get in_depth knowledge of their needs and preferences. Based on this, you can determine your marketing objectives and position your product suitably.