4급 ‘마스가 과장’, 단숨에 2급 국장 파격 직행…“李대통령 OK”
If the subject line of the email is irrelevant to customers, they will ignore it multiple times. But, if it keeps repeating, they are intercepted and unsubscribed from your emails. So, send relevant emails for the benefit of the customer. Don't send emails that often only focus on sales, offers and discounts.
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How much do resident doctors earn?
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