9. What is the difference between a cold email and a spam email?
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Again, the answer to this question varies from company to company. And again, testing is the way to find out what works best. Typically, weekends and mornings seem to be times when multiple emails are opened, but since your audience may have different habits, it's best to experiment and then use your data to decide.，更多细节参见safew官方版本下载
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