“According to eMarketer, 54 percent of people say they unsubscribe from emails because they come too frequently; 49 percent say boring content was another factor. Testing the timing of emails and frequency — not to mention content mix — can help marketers understand what works most effectively for different audience segments.”
It’s important to find the right balance when sending emails as part of an ongoing campaign. You have to know when to stop sending email after email, so you don’t burn out your customers or potential customers. Don’t overdo it or overwhelm.