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Email marketing returns an average of $36–$42 for every $1 spent making it the highest-ROI digital marketing channel available to US businesses today. But "cost-effective" does not mean free, and if you have ever searched for a straight answer on what email marketing actually costs, you have probably been met with vague ranges and platform-specific sales pitches. This guide is different. At Lumilinx, we have managed email programs for businesses from solo founders to multi-location...