AT&T's mobile business email portfolio includes server-based and personal solutions for PDAs/smartphones/BlackBerrys, including Good Mobile Messaging, Microsoft Direct Push, BES/BIS and Xpress Mail for prosumers and SMBs. This report contains insight and analysis of the product or service strengths and weaknesses, list of buying criteria and how the product or service fares in each category, and a comprehensive table of product or service metrics and specifications. This report is useful for purchasers who need to evaluate products, or as a source of competitive intelligence for vendors.